Sunday

April 20, 2014

April 20, 2014

Number of results: 10,560

**alegbra 2**

Did you make a sketch? Doesn't ABC form a right-angled triangle? How long is AC ? (use Pythagoras to find it is always 5 inches) So as A is fixed, isn't AC always 5 as the triangle is rotated about A ? So I see a circle with centre at A and a radius of AC = 5.
*Wednesday, February 4, 2009 at 10:32pm by Reiny*

**Math**

sorry i dont see a picture. But, I'll explain what should be seen. Make a right triangle. From the angle <B, where B is 90 degrees, draw an altitude down to CA. Call that point D. We see that ABC and BCD are similar triangles. BC/CD=AC/BC, so BC^2=AC*CD. Likewise, ADB is ...
*Monday, November 19, 2012 at 11:26am by mathtaculator*

**solid mensuration**

The circle radius is 5 cm. That comes from the area. The triangle ACB is a right triangle with AB as a diameter. The length of AB is 10 cm, since it is a diameter (AC)^2 + (BC)^2 = (AB)^2 = 100 Area = (1/2)(AB)*(BC) = 11 (AC)*(BC) = 22 (BC)=22/(AC) (AC)^2 + 484/(AC)^2 = 100 ...
*Saturday, December 1, 2012 at 7:13am by drwls*

**geometry**

All right-triangles inscribe in a circle with a diameter equal to the hypotenuse. Therefore for the 30-60-90 triangle, the radius of the circle is 6 inches, and the short side is also 6 inches. The height is 6sqrt(3), so the area of the triangle is At=36sqrt(3)/2 = 18 sqrt(3) ...
*Thursday, May 10, 2012 at 1:16am by MathMate*

**math**

Let triangle ABC be a triangle such that angle ACB is 135 degrees. Prove that AB^2 = AC^2 + BC^2 - (Root 2) x AC x BC
*Saturday, July 24, 2010 at 1:33pm by eric*

**math**

Let triangle ABC be a triangle such that angle ACB is 135 degrees. Prove that AB^2 = AC^2 + BC^2 - (Root 2) x AC x BC
*Saturday, July 24, 2010 at 1:34pm by eric*

**Math**

ABC is an isosceles triangle. If AB =AC =16, BC=8. D is the midpoint of side AC , and G is the centroid of triangle ABC , find BD .
*Thursday, December 19, 2013 at 6:12pm by Lwint*

**Math**

A(-11,8)B(2,-6) and C(-19,-8) are the vertices of Triangle ABC. N(X,Y) is a point on AC such the BN is Perpendicular to AC. Find Area of Triangle ABC. PLEASE HELP!!!
*Saturday, January 24, 2009 at 9:07pm by Anonymous*

**Math. Urgent please help**

ABC is an isosceles triangle. If AB =AC =16, BC=8. D is the midpoint of side AC , and G is the centroid of triangle ABC , find BD .
*Friday, December 20, 2013 at 8:48am by Lwint*

**math**

in a triangle ABC it is known that AB=AC. Suppose D is the mid point of AC and BD=BC=2. Then the area of the triangle ABC is
*Monday, November 5, 2012 at 5:22am by avadhesh*

**Math**

In Triangle ABC, AC = BC and mC = 62°. The longest side of the triangle is: AC BC AB AM
*Monday, January 16, 2012 at 8:43pm by Trisha*

**math**

In Triangle ABC, AC = BC and mC = 62°. The longest side of the triangle is: AC BC AB AM
*Monday, January 16, 2012 at 11:01pm by Trisha*

**isosceles triangle**

An isosceles triangle is a triangle that has two equal sides. Find AB, BC and AC. Determine if the triangle is isoseles or not based on the lengths of the three sides. can someone show me how to solve?please The triangle is isosceles if AB = BC, or BC = AC, or AB = AC. Without...
*Thursday, July 26, 2007 at 9:59am by Jim*

**Math(Geometry)**

In the diagram below(no diagram but details will be provided), right triangle ABC and line BD is an altitude to side line AC. * Prove that (AB)^2=(AC)(AD) -When you label the triangle B should be were the right angle is C should be at the top of the triangle and it should be ...
*Wednesday, November 24, 2010 at 8:17pm by Phyllis *

**Geometry**

ABC is a triangle with circumcenter O , obtuse angle BAC and AB<AC . M and N are the midpoints of BC and AO respectively. Let D be the intersection of MN with AC . If AD=1 2 (AB+AC) , what is the measure (in degrees) of ÚBAC ?
*Monday, April 8, 2013 at 10:29pm by Jacob*

**Geometry**

ABC is a triangle with circumcenter O , obtuse angle BAC and AB<AC . M and N are the midpoints of BC and AO respectively. Let D be the intersection of MN with AC . If AD=1 2 (AB+AC) , what is the measure (in degrees) of ÚBAC ?
*Thursday, April 11, 2013 at 6:54pm by Anonymous*

**basic geometry**

the three verticies of a triangle can be found at the points A(2,3) , B(-3,6), C(-4,-3) how long is each side of the triangle ab,bc,and ac explain how you got the answer. is this triangle a right triangle ? why and explain.
*Wednesday, December 11, 2013 at 9:05am by anabelle need help!*

**Geometry**

What is the ratio of the area of triangle XBY to the area of the triangle ABC for the given measurements, if XY is similar to AC, and XY=2 and AC=3
*Monday, May 17, 2010 at 9:57pm by Kaley *

**GEOMetry(TRIANGLE)**

ABC is an isosceles triangle where AB=AC and BC=60. D is a point on BC such that the perpendicular distance from D to AB and AC is 16 and 32, respectively. What is the length of AB?
*Monday, March 25, 2013 at 2:10am by i need help from anyone!*

**MATH**

1. Let triangle ABC be a triangle such that angle ACB is 135 degrees. Prove that AB^2 = AC^2 + BC^2 - (Root 2) x AC x BC 2. Simplify: 2/1! - 3/2! + 4/3! - 5/4! + ..... + 2010/2009! - 2011/2010! Where k! is the multiplication of all numbers up to k (e.g. 5! = 5x4x3x2x1=120) 3. ...
*Saturday, August 21, 2010 at 12:27pm by Gerald*

**geometry**

I don't know at what level of geometry you are starting, but a property of the circumscribed circle of a triangle is that the diameter of the circumcircle is equal to the length of any side of the triangle divided by the sine of the opposite angle so in your case the diameter ...
*Monday, April 12, 2010 at 10:24am by Reiny*

**math**

ABC is a triangle with circumcenter O, obtuse angle BAC and AB<AC. M and N are the midpoints of BC and AO respectively. Let D be the intersection of MN with AC. If 2AD=(AB+AC), what is the measure (in degrees) of ∠BAC?
*Wednesday, April 10, 2013 at 7:51am by stranger*

**geometry**

Correct. I get P(C\T) (probability inside circle minus triangle) =(Ac-At)/Ac =81.92/113.1=72.4%
*Thursday, May 10, 2012 at 1:16am by MathMate*

**maths**

E is the mid-point of median AD of the triangle ABC and BE is produced to meet AC at F. Show that AF = 1 1/2 AC
*Tuesday, December 4, 2012 at 1:46am by manpreet*

**geometry**

the quesiton is land in the circle, but outside the triangle. Is it the probability is (AC - AT)/AC 81.22/113 x 100% = 72%
*Thursday, May 10, 2012 at 1:16am by Piggy*

**precalculus**

let AB be the original path, then veer off at 7° for BC. Join AC I see a long skinny triangle ABC with angle ABC = 173° The lengths of AB and BC are 2.5(695) and 3(695) respectively, but we can just ignore the 695 for the time being and use the smaller similar triangle to keep...
*Tuesday, December 4, 2012 at 7:33am by Reiny*

**Precalculus**

Ok, let's do that triangle again. draw AB the first vector, and AC, the second vector. draw AP, the resultant. angle BAP = 52 angle CAP = 20 AP = 80 complete the parallelogra BACP, then angle APB=20 angle B = angle C = 108 AC/sin52 = 80/sin108 AC = 80sin52/sin108 = 66.3 (...
*Tuesday, August 9, 2011 at 2:01pm by Reiny*

**heeeeeeelp geometry**

In a triangle ABC, BK is an angle bisector. A circle with radius 5/3 passes through the vertex B, intersects AB at a point L, and is tangent to AC at K. It is known that the length of AC is 3√3, and the ratio of the lengths |AK| to |BL| is 6:5. The area of the triangle ...
*Saturday, June 1, 2013 at 6:24am by andrew*

**geometry!**

I placed D outside the triangle top-right of A, joined CD and AD In triangle ABC , it is easy to see that angle ACB = 42° and if angle DCA= 48° , then angle BCD = 90° (this helps to make a reasonable sketch) Suppose we let AC = 5 (anything will do) then by the sine law: BC/...
*Monday, February 18, 2013 at 12:36am by Reiny*

**Geometry**

ABC is a triangle with circumcenter O, obtuse angle BAC and AB less than AC. M and N are the midpoints of BC and AO respectively. Let D be the intersection of MN with AC. If 2AD=(AB+AC), what is the measure of angle BAC ?
*Thursday, April 11, 2013 at 11:27am by Andy*

**Math(Geometry)**

let angle A be x let angle C be y In triangle ADB, if angle ADB = 90, then angle ABD = y then angle DBC = x and triangle ADB is similar to triangle BDC is similar to triangle ABC then AB/AC = AD/AB (AB)^2 = (AC)(AD)
*Wednesday, November 24, 2010 at 8:17pm by Reiny*

**geometry**

Triangle ABC is a right triangle such that m angle B= 90 degrees. If AC= 12 and BC=9, what is the perimeter of triangle ABC ? round to the nearest tenth.
*Wednesday, May 18, 2011 at 6:03pm by Misty*

**trigonometry**

make a diagram label the tower AB , where A is the top of the tower. label the man's first position C, his second position D so that DC = 300 Look at triangle ADC, angle D = 35° angle ACD = 110° , so then angle DAC = 35° so the triangle is isosceles (lucky) and AC = 300 Then ...
*Tuesday, July 12, 2011 at 10:11am by Reiny*

**Trigonometry**

You are obviously looking at or have made a diagram. let the top of the falls be point C In triangle ABC B = 52.9° A = 110.7° , the supplement of 69.3 then angle C = 16.4° by the Sine law AC/sin52.9 = 1000/sin16.4 AC = 2824.8913... now in the right-angled triangle sin69.3 = ...
*Saturday, June 16, 2012 at 10:39pm by Reiny*

**Geometry **

Please answer at least one . PLEASE 1. Triangle XYZ has a right angle at Y. V,W are on XZ such that XV=XY. WZ=YZ, find ANGLE VYW . 2. STUVWXYZ is a regular octagon. Find SW/ TZ. 3. The interior angles of a convex polygon form an arithmetic progression with a common difference ...
*Saturday, October 19, 2013 at 9:13am by Jayden*

**geometry**

The medial triangle of a triangle ABC is the triangle whose vertices are located at the midpoints of the sides AB, AC, and BC of triangle ABC. From an arbitrary point O that is not a vertex of triangle ABC, you may take it as a given fact that the location of the centroid of ...
*Tuesday, April 30, 2013 at 10:21am by denise*

**maths**

sum: m + n = -b/a product: mn = c/a substitute. when proving, you only manipulate/solve one side. mnb^2=(m+n)^2 ac (c/a)(b^2) =? (ac)(m+n)^2 (c/a)[a(m + n)]^2 =? (ac)(m+n)^2 (c/a)(a^2)(m+n)^2 =? (ac)(m+n)^2 (ac)(m+n)^2 = (ac)(m+n)^2 this problem is pretty much the same as the ...
*Saturday, August 17, 2013 at 6:01am by Sasuke*

**math**

The ladder makes a right triangle ABC with the building, where A is the bottom of the ladder, B is a right angle (wall with ground) and C is the top of the ladder. Now AC = 9 m. and CAB = 75 degrees. We know that AB/AC = cos(75) and AC is known. So AB = AC cos(75) = horizontal...
*Sunday, July 19, 2009 at 10:35pm by MathMate*

**Trigonometry**

ABC is an isosceles triangle, so the altitude BM intersects AC in the middle. cos BCM = 5/7 area = 1/2 AC * BM
*Saturday, September 22, 2012 at 5:46pm by Steve*

**math**

Let ABC be a triangle such that angle ACB = 135 degrees. Prove that AB^2 = AC^2 + BC^2 + ¡Ì2 x AC x BC.
*Saturday, August 7, 2010 at 1:37am by mathsen*

**math**

in an isosceles triangle ABC ,AB=AC.if AB and AC are produced to D and E respectively so that BD=CE.prove thatBE=CD
*Sunday, April 22, 2012 at 9:47am by majumder*

**math**

in an isosceles triangle ABC ,AB=AC.if AB and AC are produced to D and E respectively so that BD=CE.prove thatBE=CD
*Thursday, April 26, 2012 at 10:25am by majumder*

**MATH**

1. Let triangle ABC be a triangle such that angle ACB is 135 degrees. Prove that AB^2 = AC^2 + BC^2 - (Root 2) x AC x BC There is probably an error in the sign, because the result is obtained directly by application of the cosine law, and substituting cos(135°)=-√2 ...
*Saturday, August 21, 2010 at 12:27pm by MathMate*

**geometry**

If AC were 9, the points would lie in a straight line. But, since AC is shorter, point B has to rise out of the line, making ABC a triangle.
*Thursday, September 5, 2013 at 1:55pm by Steve*

**Math, Trig**

Draw a "side view" Draw 3 points on the river, B , C, and D , B to the left of the points draw a point A above B so that angle B is 90° Join AC and AC , so that CD = 20 Mark angle ADC = 62.6° and angle ACB = 72.8° label AB =h (h is the height) , BC = x in triangle ABC: tan 72....
*Monday, October 1, 2012 at 8:00pm by Reiny*

**math**

ABC is a triangle with AC=139 and BC=178. Points D and E are the midpoints of BC and AC respectively. Given that AD and BE are perpendicular to each other, what is the length of AB?
*Tuesday, June 25, 2013 at 5:22am by anonymous*

**Math**

12. In a triangle ABC, AC = 36, BC = 48, and the medians BD and AE to sides AC and BC, respectively, are perpendicular. Find AB.
*Friday, December 6, 2013 at 6:36pm by Xian*

**Geometry**

Triangle ABC is a Right Triangle If AB=3 and AC=7 find BC. Leave your Answer in Simplest Radical Form.
*Thursday, November 29, 2012 at 10:21am by Anonymous*

**Math **

Triangle ABC is a right triangle. If AB = 3 and AC = 7, find BC. Leave your answer in simplest radical form.
*Tuesday, October 15, 2013 at 5:25pm by Rachelle*

**college geometry**

Given: right triangle ABC with right angle at C, AC=22 and BC=6.Draw altitude CD where D is o hypotenuse AB. What is the ratio of the area of triangle ADC to the area of triangle CDB?
*Sunday, December 12, 2010 at 11:43pm by Kathy*

**Math**

Without plotting I see three points, so it must be a triangle. To be more specific it is an isosceles triangle with a horizontal base of AC
*Saturday, February 2, 2013 at 10:40pm by Reiny*

**geometry**

A = (b/2) *h, Multiply the base by 2 and get: A = b*h, So the area is doubled. Let's calculate the area of the given triangle. A(1,1), B(9,1), C(5,5). AB = 9 - 1 = 8 = base. (AC)^2 = (5-1)^2 + (5-1)^2, (AC)^2 = 16 + 16 = 32, AC = sqrt32 = 5.66. (b/2)^2 + h^2 = (AC)^2, 4^2 + h^...
*Wednesday, March 9, 2011 at 8:10pm by Henry*

**trigonometry**

given triangle ABC with AB=7cm, BC=8cm and AC=9cm calculate 1. the size of the largest angle 2. the area of the triangle
*Saturday, April 21, 2012 at 5:18pm by lindsay*

**Geometry**

Can I get help starting this exercise:- Let triangle ABC be such that AB is not congruent to AC. Let D be the point of intersection of the bisector of angle A and the perpendicular bisector of side BC. Let E, F, and G be the feet of the perpendicular dropped from D to line AB...
*Tuesday, October 20, 2009 at 8:58am by Julie*

**geometry**

ABC IS a isoceles triangle in which AB=AC 'IF AB and AC are produced to D and E respectively such that AB = CE.prove that BE =CD
*Wednesday, August 15, 2012 at 12:32pm by TUHITUHI*

**math**

It is a proof. Given: line DB bisects line AC line AD is parallel to line BE AD=BE Prove: DB=EC there are two triangles connected together by point B. They are labled A D B and B E C. D and E are the top points of the triangles. they look like they would be right angle ...
*Sunday, October 8, 2006 at 8:52pm by ann*

**geometry**

I do not understand the meaning of the ƒ´ symbol that appears in front of ABD. Is ABD a triangle? If BC is an altitude of the triangle ABD, then the Pythagorean theorem tells you that AC = sqrt[(16)^2 +(30(^2] = 34. The angle at A is therefore arctan (15/8) = 61.93 degrees You...
*Sunday, June 27, 2010 at 6:23am by drwls*

**logic and set theory**

Let P=if ABC is a right-triangle at B Q=AB²+BC²=AC² The given symbolic statement ~P <-> ~Q translates to ABC is NOT a right-triangle at B if and only if AB²+BC² ≠ AC² or in two sentence form: (if ABC is NOT a right-triangle at B then AB&...
*Tuesday, July 21, 2009 at 8:14pm by MathMate*

**Analytic geometry - finding point by intersect lin**

I have a triangle ABC. The slope of AB is -1/ab, the slope of AC is -1/ac, and the slope of BC is -1/ac. My question is, I have 3 lines: Altitude from A to BC, altitude from B to AC, and altitude from C to AB. I know their slope because it is just -1/slope. But I want to know ...
*Tuesday, March 5, 2013 at 9:38am by Knights*

**trig**

The shortest possible length of triangle ABC, where ∠B = 20°, and BC=5 can be obtained by making AC perpendicular to AB. This way, ∠A is 90° and the side AC can be obtained by the trigonometric formula: AC = BC*sin(20°).
*Monday, April 25, 2011 at 7:07pm by MathMate*

**Geometry**

Can you help me with Always, Sometimes, Never questions?? I have answered all of these, but I am not sure if they are right. 1. The base angle of an isosceles triangle are acute----Always 2. When the altitude and the median are drawn from the same vertex of a triangle, the ...
*Tuesday, May 28, 2013 at 9:02pm by Melissa*

**For Anubhav**

I made a sketch of triangle ABC drew in the bisector of angle A and drew the altitude AM In triangel ANC NC = 21, angle NAC = 45° 21/sin45 = AC/sinØ sinØ = (sin45)(AC)/21 sinØ = √2 AC/42 in triangle ABN BN = 1, angle BAN = 45° AB/sin(180-Ø) = 1/sin45 sin(180-Ø) = √...
*Thursday, May 16, 2013 at 10:09pm by Reiny*

**Geometry Honors**

Can someone help me with Always, Sometimes, Never questions?? I have answered all of these, but I am not sure if they are right. 1. The base angle of an isosceles triangle are acute----Always 2. When the altitude and the median are drawn from the same vertex of a triangle, the...
*Tuesday, May 28, 2013 at 9:34pm by Melissa*

**Maths**

In triangle ABC, D is the midpoint of AC and E is the midpoint of AB. BD and CE are perpendicular to each other and intersect at the point G. If AB=7 and AC=9, what is the value of BC^2?
*Friday, April 12, 2013 at 5:07am by Ian*

**geometry**

right triangle ABC with right angle C, AC=22 and BC=6, altitude CD where D is on hypotenuse AB. What is the ratio of the area of triangle ADC to the area of triangle CDB? Write ratio as n:1 and round n to the nearest hundredth.
*Tuesday, November 30, 2010 at 6:08pm by suzy*

**trig**

sketch a triangle ABC , where A=15, B=65 and C = 100° let AB = a and BC = c by the sine law: c/sin100 = a/sin15 c = asin100/sin15 area of triangle = (1/2)(ac)sin 65 50 = (1/2)(ac)sin65 100 = a(asin100/sin15)(sin65) a^2 = 100sin15/( sin100sin65) a^2 = 28.998 a = √28.998...
*Sunday, April 3, 2011 at 8:12pm by Reiny*

**geometric problem-math**

P=sum three sides P=BC+Ab+Ac 62=AC+AC-2+1 solve for AC first, then AC-2 (which is AB) Are you certain about BC?
*Saturday, July 2, 2011 at 8:45am by bobpursley*

**Physics, please help**

Distruive interference? Unless you put C in the line between A and B, this the asnwer is at infinity. Now on the line between A and B, the distance from A to C has to be an odd multiple of halfwavelength greater than C to B. Now, the distance between the speakers is two ...
*Friday, May 4, 2007 at 4:04am by Papito*

**Alegebra 1**

The diameter is the longest side, and the longest side of a rt. triangle is the hyp. (AC)^2 = 8^2 + (15)^2 = 289, AC = 17.
*Thursday, March 10, 2011 at 6:36pm by Henry*

**geometry**

Let ABC be a right triangle with ACB =90, AC =6 , and BC =2. E is the midpoint of AC , and F is the midpoint of AB . If CF and BE intersect at G , then cos(CGB), in simplest radical form, is ((k square root w)/f) where k , w , and f are positive integers. Find the value of k+w...
*Saturday, March 2, 2013 at 2:02pm by Anonymous*

**trig**

Draw a right triangle, and label it ABC. AB should be the hypotenuse, BC the vertical side, and AC, the horizontal side. Angle C is the right angle. make angle A 33 deg.and AB 45m. We are going to solve the triangle using the trig. functions. 45m*COS A = 45m*COS33 = 37.7m = AC...
*Monday, July 12, 2010 at 10:33am by Henry*

**trig**

did you make a diagram ? let the top of the monument be A and the bottom be B let the person's position be at P Draw a horizontal from P to AB to meet AB at C. then CB = 9 angle APC = 6°' 50' or 6.8333° angle BPC = 7° 30' or 7.5° Using triangle PBC you can find PC using tan7.5...
*Tuesday, February 15, 2011 at 12:14am by Reiny*

**Geometry**

Draw a triangle ABC with A at the center of the base, B at the tip of the pyramid, and C at the middle of one side. Then AC = 482 * cot 52 AC is also half the length of a base side.
*Friday, January 13, 2012 at 11:00pm by Steve*

**Geometry**

What is the ratio of the area of triangle XBY to the area of triangle ABC for the given measurements, if XY is similar to AC?
*Monday, May 17, 2010 at 9:51pm by Kaley *

**geometry**

if the perimeter of triangle ABC is 28 and X,Y,Z are the midpoints of AB, BC, and AC respectively, find the perimeter of triangle XYZ
*Thursday, March 4, 2010 at 1:52pm by Anonymous*

**Geometry **

What is he ratio of the area of triangle XBY to the area of triangle ABC for the given measurements, if XY is similar to AC, and BY=3, YC=2 ?
*Monday, May 17, 2010 at 9:54pm by Kaley *

**Geometry**

What is the ratio of the area of triangle XBY to the area of triangle ABC for the given measuremnts, if XYis similar to AC, and BY=2 and BC=4?
*Monday, May 17, 2010 at 10:19pm by Kaley *

**math**

What is the ratio of the area of triangle XBY to the area of triangle ABC for the given measuremnts, if XYis similar to AC, and BY=2 and BC=4?
*Tuesday, May 18, 2010 at 12:23am by buggy*

**minor typy - Genius Math**

I just notice two typos, but they don't affect the solution. in the bracketed angle , it should say (228-x) let angle ADC = x then angle BDC = 360-x-132 = 228-x in triangle ADC, by the sine law, DC/sin24 = AC/sinx DC = AC sin24/sinx in triangle BCD, DC/sin12 = BC/sin(228-x)
*Tuesday, December 24, 2013 at 1:49am by Reiny*

**geometry**

In triangle ABC, • AB is x cm long • BC is twice the length of AB • AC is 10 cm longer than AB. The perimeter of the triangle is 42 cm. Write down an equation in x and solve it. Use your answer to find the lengths of the sides of the triangle.
*Sunday, January 16, 2011 at 11:42am by Anonymous*

**Geometry **

Triangle ΔABC has vertices A(2,5), B(8,1) and C(-2,-1) and is a right triangle. If the slope of AB is -2/3 and the slope of AC is 3/2, are the lines parallel, perpendicular or neither?
*Saturday, July 14, 2012 at 6:39pm by Math*

**math**

Triangle ΔABC has vertices A(2,5), B(8,1) and C(-2,-1) and is a right triangle. If the slope of AB is -2/3 and the slope of AC is 3/2, are the lines parallel, perpendicular or neither?
*Saturday, July 14, 2012 at 9:35pm by ashley*

**geometry**

In triangle ABC, CD is both the median and the altitude. If AB=5x+3, AC=2x+8, and BC=3x+5, what is the perimeter of triangle ABC?
*Monday, October 4, 2010 at 5:16pm by Anonymous*

**geometry**

In triangle ABC, A (o,o) , <BAC = 30 degree , AC =2 and midpoint of segment AB is (4,0) and if B is on the x axis, find the centroid of triangle ABC
*Monday, June 20, 2011 at 12:47pm by Lakshmi*

**geometry**

Open that link please please help me with my assignments 1. in the figure , the areas of traingle cef, triangle abe, triangle adf are 3,4, and 5 respectively. find the area of triangle aef 2. equialateral triangle abc has an area of square root of 3 and side of length 2. point...
*Thursday, November 7, 2013 at 8:17am by BARBIE LEE *

**Geometry**

1. The sides of a triangle have lenghts x, x+4, and 20. Specify those values of x for which the triangle is acute with the longest side 20. 2. use the information to decide if triangle ABC is acute, right, or obtuse. AC=13, BC= sq. rt. 34, CD=3 >>i know this is obtuse ...
*Monday, March 3, 2008 at 10:30pm by Anna-Marie*

**math**

To form a proper triangle, the conditions are that the sum of any two sides must be greater than the third side. You will note that AB+BC=AC, which makes a mal-formed triangle (i.e. where the height = 0, or area = 0).
*Tuesday, June 28, 2011 at 3:17pm by MathMate*

**Math**

Solve for the length of the unknown side in the following right triangle. (Side AC is the hypotenuse.) Round your answer to two places, where applicable. Side AB ? Side BC=12 Side AC=19
*Wednesday, July 18, 2012 at 12:43am by Jim*

**Math**

C must be the right angle. You have 3 similar triangle, the original and 2 smaller ones let the altitude be h 2/h = h/16 h^2 = 32 h = √32 in the smaller right-angled triangle h^2 + 2^2 = BC^2 BC^2 = 32 + 4 = 36 BC = 6 In the other right-angled triangle: AC^2 = h^2 + 16^2...
*Saturday, December 7, 2013 at 8:40am by Reiny*

**Vectors**

let AB represent vector AB, and AC as vector AC AB = (-2,-6,-3), |AB| = 7 AC = )3,-1,-11) |AC| = √131 AB•AC = |AB||AC|cos Ø cosØ = 33/(7√131) Ø = 65.676 area = (1/2)(AB)(AC)sinØ = 36.5
*Friday, May 14, 2010 at 7:17pm by Reiny*

**Geometry**

ABC is an isosceles triangle where AB = AC and BC = 60. D is a point on BC such that the perpendicular distance from D to AB and AC is 16 and 32, respectively. What is the length of AB?
*Tuesday, March 26, 2013 at 11:31pm by Dan*

**geometry**

Triangle ABC is an isosceles triangle, where angle B is the vertex angle. If BC = 10x-4 , AC= 2x+18 , and AB= 6x+32, find the value of x.
*Wednesday, December 15, 2010 at 7:03pm by tim*

**Maths**

Triangle ABC has lengths AB=14, AC=18 and also a given angle of ∠BAC=30∘. What is the area of triangle ABC?
*Friday, April 12, 2013 at 5:05am by Ian*

**Geometry - semicircle inside isosceles triangle**

Isosceles triangle ABC has sides of length AB=AC=25 and BC=40 . Find the area of a semicircle inscribed in triangle ABC with diameter along BC . Please help I do not know how to start....
*Thursday, March 21, 2013 at 2:14pm by Knights*

**maths**

Choose three options which are true: a) an angle of 150 degrees is equivalent to 2pie/3 radians. b) Cos 0 = cos (0 – pie/2) for al values of 0. c) Sin 0 = cos (0 – pie/2) for all values of 0. d) If triangle ABC has a right angle at B, then sin A = cos C e) In any triangle ABC...
*Friday, June 8, 2007 at 6:31pm by kat*

**College Physics**

Total Acceleration will consist of Centripetal (which is in the same direction as the r vector) and Tangential (which at any given moment will be your retarding one. With that we can set up a triangle that gives us the angle needed. Since we don't know radius we can use V=r2Pi...
*Saturday, February 11, 2012 at 8:17pm by dark*

**geometry**

make a diagram Triangle ABC with AB=17, BC=8 and AC = 15 Did you realize that your triangle is right-angled, with angle C = 90° ? let the points of contact of the circle be D on BC, E on AC, and F on AB Two properties we can use ... 1. The centre of the incscribed circle lies ...
*Tuesday, June 8, 2010 at 7:03am by Reiny*

**math**

That sure helps a lot, I was working with 3 different equations, with cosine law equations and it got real messy. Let the triangle be ABC, where AB=26, AC=30 and BC=28 The circle will have to be on the bisector of angle A, let it fall on BC at D. Then the radius is the line ...
*Monday, January 10, 2011 at 11:08pm by Reiny*

**heeeeeeeeeeelp math**

Triangle ABC has an obtuse angle at B, base BC has length equal to 30 and height equal to 24. D is a point on the line segment BC and E is a point on AC such that DE∥AB. F is a point on AB such that FD∥AC. As D varies within line segment BC, what is the maximum ...
*Thursday, June 6, 2013 at 12:28am by clavin*

**heeeeeeeeeeelp math**

Triangle ABC has an obtuse angle at B, base BC has length equal to 30 and height equal to 24. D is a point on the line segment BC and E is a point on AC such that DE∥AB. F is a point on AB such that FD∥AC. As D varies within line segment BC, what is the maximum ...
*Thursday, June 6, 2013 at 9:20am by clavin*

Pages: **1** | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | Next>>