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July 25, 2014

Search: Prove that angle ABC is a isosceles triangle,if the altitude AD BISECTS THE BASE BC

Number of results: 19,211

Trigonometry
1. What is the area of triangle ABC if a = 47.0, β = 57.8, and a = 10.2 cm? A. 58.2 cm2 B. 43.5 cm2 C. 38.4 cm2 D. 33.3 cm2 2. Given triangle ABC with β = 41, g = 14, and a = 5.0, find the value of c. A. 6.2 B. 4.0 C. 1.5 D. 17 3. Resolve the vector, v, with ...
December 2, 2012 by Erick

Trigonometry
1. What is the area of triangle ABC if a = 47.0, β = 57.8, and a = 10.2 cm? A. 58.2 cm2 <----------- B. 43.5 cm2 C. 38.4 cm2 D. 33.3 cm2 2. Given triangle ABC with β = 41, g = 14, and a = 5.0, find the value of c. A. 6.2 B. 4.0 C. 1.5 <---------- D. 17 3. ...
December 3, 2012 by Erick

Geomatry
In triangle ABC, angle Bis five less than twice angle A and angle Cis sixty less than angle B. What is the measurment of all of the triangles angles?
November 10, 2011 by Angelique

math
an altitude of triangle is 5/3rd of the length of its corresponding base if their altitude be increased by 4cm and the base is decreased by 2cm, the area of the triangles remain the same. find the base and altitude of triangle ?????
October 7, 2012 by TUHITUHI

math
triangle ABC is isoceles with segment AB congruent tp segment AC. Angle A is 50. The bisectors of angle B and angle C meet at D. Find the measure of angle BDC
December 10, 2012 by julian

math
the right triangle ABC,<ABC is the right angle. If sin<C=3/5, find the Tan<A. I did 0/9 and put it in the calculator and got 4/3 Is this correct? Thanks for checking my work
March 3, 2014 by B8

Geometry
Given: X, Y, and Z are the midpoints of teh sides of triangle ABC. Find rhe ratio of the area of triangle XYZ to the area of triangle ABC
February 22, 2010 by TIMMYRA

geometry
In right triangle ABC, angle A=3, angle B=60, and angle C=90. Find AB with AC is 12 ?
December 5, 2010 by Eliza

Algebra
In a triangle ABC, angle B is three times angle A and angle C is 5 degrees less than 6 times angle A. Find the size of the angles.
March 10, 2010 by Dora

geometry question proof needed
Medians AX and BY of Triangle ABC are perpendicular at point G. Prove that AB=CG.
November 15, 2012 by geometrygeeeeek

Geometry
Prove that in any triangle ABC, the median from A to the segment joining the midpoints of AB and AC bisect each other.
December 3, 2012 by Delia

maths
an isosceles triangle is such that each of the base angles is twice the vertical angle. Find the angles of the triangle
September 27, 2011 by ferjam

geometry
triangle abc is similar to def, the lengths of the sides of triangle abc is 5,8,11. what is the length of the shortest side of triangle def if its perimeter is 60?
February 28, 2013 by c

math
In a triangle ABC,angle B is 3 times angle A and angle C is 5 degrees less than 6 times angle A. Find the size of the angles.
September 18, 2010 by Anonymous

algebra
In a triangle ABC , angle B is 4 times angle A and angle C is 17 degrees less than 5 times angle A. Find the size of the angles.
September 21, 2010 by Sam

Geometry
Given: A(3,-1), B(5,2), C(-2,0), P(-3,4), Q(-5,-3), R(-6,2). Prove: angles ABC and RPQ are congruent by completing the paragraph proof. AB=RP=13, BC=(?)=53, and CA=QR=26. So segment AB is congruent to (?), segments BC and PQ are congruent and segment CA is congruent to segment...
July 24, 2011 by Lisa

Math
The two sides of a isosceles triangle have a fixed lenght of 14 cm. The opposite angle at the base of the triangle increases by 0.3 rad/min. a) what is the growth rate dx/dt of the base of the triangle when the opposite angle mesures 1.6 rad? (Use the law of sin) b) What is ...
April 19, 2011 by Ralph

Math
The two sides of a isosceles triangle have a fixed lenght of 14 cm. The opposite angle at the base of the triangle increases by 0.3 rad/min. a) what is the growth rate dx/dt of the base of the triangle when the opposite angle mesures 1.6 rad? (Use the law of sin) b) What is ...
April 19, 2011 by Ralph

Math
The two sides of a isosceles triangle have a fixed lenght of 14 cm. The opposite angle at the base of the triangle increases by 0.3 rad/min. a) what is the growth rate dx/dt of the base of the triangle when the opposite angle mesures 1.6 rad? (Use the law of sin) b) What is ...
April 20, 2011 by Ralph

Math
The two sides of a isosceles triangle have a fixed lenght of 14 cm. The opposite angle at the base of the triangle increases by 0.3 rad/min. a) what is the growth rate dx/dt of the base of the triangle when the opposite angle mesures 1.6 rad? (Use the law of sin) b) What is ...
April 20, 2011 by Ralph

Trigonometry
ABC is a non-degenerate triangle such that 2\sin \angle B \cdot \cos \angle C + \sin \angle C = \sin \angle A + \sin \angle B, what is the value of \lfloor 100 \frac {AC}{AB} \rfloor ?
March 12, 2013 by John

maths
medians of triangle ABC intersect at G. if ar(triangle ABC) = 27 CM^2, then ar(triangle BGC) =?
January 3, 2013 by Anonymous

math
Prove the following: if, in a triangle ABC,BA =CB O in atriangle m BAO = m OAC = 20, m ACO = 10, and m OCB = 30, then m OBC = 80.
August 6, 2007 by nbvhj

math
In a triangle ABC, angle B is 5 times angle A and angle C is 18 less than 4 times angle A. Find the size of the angles.
April 2, 2010 by anonymous

algebra 1
In a triangle ABC,angle b is 4 times angle "A" and angle "C" IS 17 less than 5 times angle "A". Find the size of the angles.
December 16, 2010 by esther

algebra 1
In a triangle ABC,angle b is 4 times angle "A" and angle "C" IS 17 less than 5 times angle "A". Find the size of the angles.
December 16, 2010 by esther

CAL
The altitude of a triangle is increasing at a rate of 2500 centimeters/minute while the area of the triangle is increasing at a rate of 4000 square centimeters/minute. At what rate is the base of the triangle changing when the altitude is 11500 centimeters and the area is ...
July 9, 2011 by Laura Le

CAL
The altitude of a triangle is increasing at a rate of 2500 centimeters/minute while the area of the triangle is increasing at a rate of 4000 square centimeters/minute. At what rate is the base of the triangle changing when the altitude is 11500 centimeters and the area is ...
July 10, 2011 by lan

Math
The altitude of a triangle is increasing at a rate of 2500 centimeters/minute while the area of the triangle is increasing at a rate of 4500 square centimeters/minute. At what rate is the base of the triangle changing when the altitude is 9000 centimeters and the area is 87000...
August 23, 2011 by Ning

maths
ABCis an acute triangle with∠BCA=35∘. Denote the circumcenter ofABCasOand the orthocenter ofABCasH. IfAO=AH, what is the value of∠ABC(in degrees)?
March 30, 2013 by stranger

Calculus Please help!
The altitude of a triangle is increasing at a rate of 2500 centimeters/minute while the area of the triangle is increasing at a rate of 3500 square centimeters/minute. At what rate is the base of the triangle changing when the altitude is 7000 centimeters and the area is 87000...
February 28, 2014 by ALI

math
prove that in an isosceles triangle the angles opposite to the equal sides are also equal .
April 17, 2008 by mota

Calculus
An isosceles triangle is to be drawn with its two equal sides of legth 10. What is the maximum possible area for the triangle? [Note: The area of a triangle is given by half the product of two sides with the sine of the included angle.]
November 15, 2010 by MEG

math
Find, correct to the nearest degree, the three angles of the triangle with the given vertices.? A(2, 0),B(4, 5), C(-3,2) ANGLE- CAB ANGLE- ABC ANGLE- BCA In degrees. I got the vectors AB <,5> BC <1,3> AC <-1,2> and I know the equation b.c= |b| |c| cos t
September 13, 2013 by christina

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!!!
January 24, 2009 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
June 20, 2011 by Lakshmi

geometry
I am really stuck on a couple of these. 2 column proof Given: FH is congruent to GE and angle HFG is congruent to angle EGF Prove: triangle GEH is congruent with triangle FHE.
December 29, 2012 by linda

math
I am really stuck on a couple of these. 2 column proof Given: FH is congruent to GE and angle HFG is congruent to angle EGF Prove: triangle GEH is congruent with triangle FHE.
December 29, 2012 by linda

geomatry
in triangle abc angle c is 90.write a indirect proof that angle a is less than 90.
January 11, 2011 by suborna

geometry
Given the triangle ABC and m<A = 22; a = 6. Find the measurement of side b if angle C is the right angle.
June 30, 2011 by Anonymous

Geometry
Given: A(3,-1), B(5,2), C(-2,0), P(-3,4), Q(-5,-3), R(-6,2). Prove: angles ABC and RPQ are congruent by completing the paragraph proof. AB=RP=13, BC=(?)=53, and CA=QR=26. So segment AB is congruent to (?), segments BC and PQ are congruent and segment CA is congruent to segment...
July 25, 2011 by Wendell

Geometry
Given: A(3,-1), B(5,2), C(-2,0), P(-3,4), Q(-5,-3), R(-6,2). Prove: angles ABC and RPQ are congruent by completing the paragraph proof. AB=RP=13, BC=(?)=53, and CA=QR=26. So segment AB is congruent to (?), segments BC and PQ are congruent and segment CA is congruent to segment...
July 26, 2011 by Wendell

math
Given: line nm is congruent to qr; angle m and angle r are right angles; line mp is congruent to ro. Prove: triangle nmo is congruent to triangle qrp and angle n is congruent to angle q
October 27, 2010 by angelica

geometry
In triangle ABC, DE is parallel to AB. If DE is one-fifth AB, what is the ratio of the area of triangle DEC to the area of triangle ABC?
December 29, 2010 by Danyoline

Geometry
Triangle ABC has vertices of A(0,0), B(4,0)and C(2,4). The coordinates of each vertex in triangle AEF are multiplied by 3 Is triangle ABC~AEF? Explain.
March 29, 2013 by Lydia

Geometry
Angle ABC and ange DBE are vertical angles,the measure of angle ABC =3x+20, and the measure or angle DBE =4x-10. Write and solve an equation to find the measure of angle ABC and the measure of angle DBEin
September 2, 2012 by Amber

Geometry
Angle ABC and ange DBE are vertical angles,the measure of angle ABC =3x+20, and the measure or angle DBE =4x-10. Write and solve an equation to find the measure of angle ABC and the measure of angle DBEin
September 2, 2012 by Amber

math
AB = 8 cm, AC = 6 cm, AD = 7 cm, CD = 2.82 and CAB=50. Find the length BC, angle ABC, angle CAD , area of triangle ACD
May 29, 2012 by Anonymous

triangles (math)
BO and CO are respectively the bisector of angle b and angle c triangle ABC.AO produced meets BC at P, then find AB/AC.
September 21, 2013 by help(in much need)!!!!!!!!!!!!!!!!!!!!

geometry
solve this proof: PR is congruent to DE, PT is congruent to DF, Angle R is congruent to Angle E, Angle T is congruent to Angle F.. Prove Triangle PRT is congruent to Triangle DEF
November 6, 2011 by Maddie

Algebra Honors
The length of the base of a triangle is 4 times its altitude. If the area the triangle is 162 cm2, find the altitude.
April 2, 2009 by Raj

math
if you have the triangle ABC with the points A(47,100) B(-1273,203) and C(971,-732) how would you find the center and the radius of the incircle of triangle ABC?
April 13, 2009 by kim

Geometry
In equilateral triangle ABC, AB=3x and BC=2x+12. Find the numerical value of the perimeter of triangle ABC.
December 29, 2010 by Lizii

geometry
in the diagram below of triangle abc, de is a midsegment of triangle abc, de=7, ab=10, and bc=13.find the perimeter
October 13, 2011 by joe

geomatry
Given: Isosceles trapezoid CPRQ with base R CXQ Prove: QCX is isosceles it needs to be a two column proof
August 19, 2008 by ashlee

Math
The base of an isosceles triangle is one inch shorter than the equal sides, and the altitude of the triangle is two inches shorter than the equal sides. What is the length of the equal sides?
September 30, 2012 by Becky

mat116
In a triangle ABC, angle B is 4 times angle A and angle C is 16 degrees less than 5 times angle A. What is the size of angle A _____ B _____ and C _____ I would like to learn this so please be so kind to walk me through the steps. I appreciate you very much!!!
November 14, 2010 by thawk

math
if you have the triangle ABC with the points A(47,100) B(-1273,203) and C(971,-732) how would you find the center point and the radius of the incircle of triangle ABC?
April 15, 2009 by kim

Math
An equilateral triangle ABC has AB=20√3. P is a point placed in triangle ABC and D,E and F are the foot of the perpendiculars from P to AB, BC and AC, respectively. If PD=9 and PE=10, what is the value of the length of PF? Please work the complete solution.
April 22, 2013 by Watson

Math
An equilateral triangle ABC has AB=20√3. P is a point placed in triangle ABC and D,E and F are the foot of the perpendiculars from P to AB, BC and AC, respectively. If PD=9 and PE=10, what is the value of the length of PF? Please work the complete solution.
April 23, 2013 by Watson

Math
In triangle ABC, angle C is a right angle. Find the measure of angle B if side b = 105 m and side c = 139 m. (Points : 1) 49 59 53 47
June 7, 2011 by CC

geometry
i have triangle inequalities. how do i prove them?? i have a figure and i have to prove an angle is bigger than another angle
April 2, 2008 by Anonymous

math
apply the rule (1.5x, 1.5y) to the vertices of triangle ABC to get triangle PDR. Compare the corresponding measurements (side lengths, perimeter, area, angle measures) of the two triangles.
November 6, 2010 by jacko

math
Apply the rule (2x, 0.5y) to the vertices of triangle ABC to get triangle FGH. Compare the corresponding measurements (side lengths, perimeter, area, angle measures) of the two triangles.
November 6, 2010 by jacko

math
the base of an isosceles triangle i 5 and its perimeter is 1. the base of a similar isosceles triangle is 10. what is the perimeter of the larger triangle? 1 15 2 21 3 22 4 110
May 7, 2009 by Anonymous

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
November 5, 2012 by avadhesh

geometry
In an isosceles triangle ABis congruent to BC. Measure of angle A is x +3y and the measure of angle C is 3x +2y. The measure of angle C is 63 degrees. Find x and y.
November 15, 2010 by Aaron

Math
In triangle ABC, angle C is a right angle. Find the measure of angle B if side b = 105 m and side c = 139 m. 49 59 53 47
June 8, 2011 by CC

geometry
In triangle ABC, angle B is a right angle. Find the remaining sides and angles. Round your answers to the nearest tenth. a = 3, c = 3
December 23, 2011 by Anonymous

Geometry
I have to do this web quest table and i just want to make sure that i did this right. please help check this for me! I did this in excel so i marked the questions with my answers with different symbols. it is a little confusing. Probability of 2 randomly chosen angles being ...
February 2, 2011 by Cheryl

calculus
The altitude of a triangle is increasing at a rate of 3.000 centimeters/minute while the area of the triangle is increasing at a rate of 2.500 square centimeters/minute. At what rate is the base of the triangle changing when the altitude is 9.000 centimeters and the area is 93...
May 14, 2012 by remy

Help me
11. Name the triangles that are classified by angles. right, scalene, isosceles scalene, isosceles, equilateral acute, right, obtuse obtuse, isosceles, acute 12. Classify the triangle by side length and angle measurement. scalene, acute isosceles, acute scalene, right ...
January 31, 2013 by Jman

geometry
Prove that you have constructed point C on segment EF such that angle ACE is congruent to angle BCF. (Points A and B are on the same side of segment EF, but have different distances to the segment.) I am not sure if I am on the right track but this is how I have tried prove it...
October 16, 2011 by Amy

Geometry
BD is a perpendicular bisector of triangle ABC. XZ is a perpendicular bisector of triangle WXY. Triangle ABC is similar to triangle WXY with a scale factor of 1:3. Part I. Find BD, AB, WZ, XZ and WX. Part II. What is the scale factor of the perimeters of triangle ABC and ...
April 6, 2010 by Jenna

geometry
What is the vertex angle of an isosceles triangle with sides that measure of 22, 22, and 28 millimeters.
April 1, 2014 by Anonymous

Geometry
in triangle ABC, BD bisects <ABC, <ABD = 4x + 6 and m<DBC = 5x -5. find the m<abc
January 1, 2013 by Arooj

geometry
in triangle abc angle b is 3 times angle a and angle c is 8degrees less than 6 times angle a?
July 6, 2010 by dj

algebra 1
suppose triangle ABC has right angle C. find the measures of the other sides to the nearest whole number. measurement of angle A is 40 BC is 5
April 20, 2011 by David

trig
ABC is rightangled triangle. AD is the bisector of angle BAC. Angle DAC=15 degrees. X=CD. Find X. I know the answer is 7.1 but do not know how to do the actual sum. Can you please help.
May 5, 2011 by jane

trig
ABC is rightangled triangle. AD is the bisector of angle BAC. Angle DAC=15 degrees. X=CD. Find X. I know the answer is 7.1 but do not know how to do the actual sum. Can you please help AB = 23 CM
May 5, 2011 by jane

math
Plot the points A(2,2), B(4,6),C(10,-2)Notice that these points are vertices of a right triangle (the angle is 90 degrees). Find the area of the triangle ABC:
February 3, 2011 by katrina

math
in the triangle ABC , AD ray bisects the exterior angle of the triangle at A and intersects CB ray at D . if AB = 6 cm , AC = 8 cm , and BC = 5 cm , find the length of BD line segment
March 2, 2011 by Hossam Nassar

geoMETRY!
ABC is an acute angle triangle with points D and E on BC and AC, respectively such that BE and AD are altitudes. AD and BE intersect at H. If ∠BCA=39∘ and ∠EBA=2∠DAB, what is the measure of ∠ABC (in degrees)?
February 26, 2013 by BATMAN

geometry!
ABC is an acute angle triangle with points D and E on BC and AC, respectively such that BE and AD are altitudes. AD and BE intersect at H. If ∠BCA=39∘ and ∠EBA=2∠DAB, what is the measure of ∠ABC (in degrees)?
February 28, 2013 by Anonymous...urgent!

Geometry
Line BD bisects angle ABC. Angle ABC= 9x. Angle ABD= 4x+13. Finds angle DBC
September 23, 2013 by Taylor

maths
in triangle abc if ab=bc then angle a = angle c or angle a = angle b
September 7, 2011 by pavatharani

math
an isosceles triangle is such that the vertical angle is four times the size of a base angle.what is the size of a base angle
October 13, 2012 by ja'afar

Advanced C
The measure of one of the equal angles in an isosceles triangle is twice the measure of the remaining angle. Determine the exact radian measures of the three angles in the triangle.
October 26, 2009 by Anonymous

geometry
In a triangle ABC, angle B is 3 times angle A and angle C is 8 degrees less than 6 times angle A. The the size of the angles. Size of angle A is = Size of angle B is = Size of angle C is = can someone please help me with this..? I am very weak at geometry...and math in general...
September 26, 2009 by Anonymous

math
In the triangle ABC ,AB=11 cm ,BC=9cm an CA=10 cm..Find area of the triangle ABC
October 10, 2011 by Anonymous

math
In triangle ABC, angle B = 3, angle A and angle C = 8 angle A. How many degrees are there in angle B ? a. 15 degree b. 30 degree c. 45 degree d. 60 degree e. 120 degree please answer and explain
April 19, 2014 by thomas

geometry
Given that Vector BD Angle ABC, Measures Of Angle ABC =6x - 12, And Angle = 72 Degres, Which Equations Could Be Used To Find The Value Of X? A - 6x - 12 = 72 B - 1/2 (6x-12) = 72 C - 2(6x - 12 = 72 D 6x - 12= 2(72) Can Anyone Help Me How To Solve Or Help Me On Anything
September 2, 2011 by jacob

geometry
Find the length of the altitude to the base of an isosceles triangle if the length of one leg is 17 and the base is 16.
March 7, 2011 by Anonymous

Math
Brilli the ant has a block of cheese that is in the shape of an equilateral triangle. She is hosting a party, and has invited her two-legged house mates. She insists that all of her guests get a piece of cheese that is in the shape of an isosceles triangle. What is the maximal...
July 15, 2013 by Mark

Math
Brilli the ant has a block of cheese that is in the shape of an equilateral triangle. She is hosting a party, and has invited her two-legged house mates. She insists that all of her guests get a piece of cheese that is in the shape of an isosceles triangle. What is the maximal...
July 16, 2013 by Mark

Trigonometry
Suppose you have an isosceles triangle, and each of the equal sides has a lenght of 1 foot. Suppose the angle formed by those two sides is 45^\circ. Then the area of the triangle is square feet.
February 10, 2010 by Ashley

geometry
Angle ABC and angle EBF are a pair verical angles. The measurement of angle ABC = 3X + 8 and the measurement of angle EBF = 2X + 48. What are the measurements of angle ABC and angle EBF
August 11, 2011 by amy

Geometry
Writing indirect proofs. Can someone please check for me. I am not sure If this is correct.Thanks much Given: triangle ABC angle B=120 degree Proof: Triangle A does not equal 60 degree Plan: Using an indirect proof, using the paragraph method My answer. Assume temporarily that...
June 4, 2007 by DANIELLE

geometry
what is the measure of the vertex angle of an isosceles triangle if one of its base angles measures 58?
September 14, 2010 by Anonymous

math
Triangle ABC has two sides that measure 12 inches and 16 inches. Which could be the measures of the corresponding sides of a triangle that is similar to triangle ABC? 1. 10 in and 14 in 2. 9 in and 12 in 3. 6 in and 10 in 4. 3 in and 8 in
February 8, 2012 by katy

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