Thursday

October 8, 2015
Number of results: 5,729

**math**

my daughter is working on calculating how many triangles point up in equilateral triangle. This is her bonus question: solve this problem for an equilateral triangle with sides measuring n units each. I'm lost, help.
*November 17, 2010 by adrianna*

**trigonometry**

In the triangle ABC, the sides AB and BC have lengths 7cm and 8cm respectively, and angle B is obtuse. the area of the triangle is 14 root 3 cm^2. Find a.The size of angle B b. The length of AC
*May 3, 2012 by lindsay*

**Rae**

The sides and classifications of a triangle are given below. The length of the longest side is the integer given. What value(s) of x make the triangle? x,x, 8; right Please provide an explanation as well. Thank you.
*December 5, 2012 by Geometry*

**Algebra 1**

So as I was doing me hw, I ran into this question, and I cant figure it out... Anyone wanna try? 7. The ratio of the perimeters of two triangles is 2:5. The perimeter of the larger triangle is 20 cm. What is the perimeter of the smaller triangle?
*January 11, 2013 by Miranda*

**Pre Alegbra**

In the given right triangle, find the missing length. The triangle has 24m on the right and on the left is c and at the bottom is 10m. a. 28m b. 26m c. 25m d. 27m
*January 20, 2013 by Shaunta Davis*

**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 MS.SUE HELP PLEASE!**

Could somebody help me I don't understand any of this. Could someone show me or tell me how to work the problems? 1. Find the length of the hypotenuse of a right triangle with the legs of 9cm and 12cm A.8 B.21 C.15 D.225 2.The length of a hypotenuse of a right triangle is 13cm...
*October 18, 2013 by bob*

**math**

lmagine an equilateral triangle and a square. The triangle has sides of 10 m and the square has sides of 15 m. One ant walks completely round the triangle twice and a beetle which walks two and a half times as fast starts walking at the same time around the square. How many ...
*January 12, 2014 by BRYAN*

**Physics - KE/inertia**

The rigid body shown in Figure 10-66 (it is a triangle with the upper mass = to M and the bottom two corners/masses equal to 2M. The bottom side length equals .70 cm with point P in the middle of the side and the other two sides equal .55 cm)consists of three particles ...
*March 27, 2007 by COFFEE*

**Precalculus**

In most geometry courses, we learn that there's no such thing as "SSA Congruence". That is, if we have triangles ABC and DEF such that AB = DE, BC = EF, and angle A = angle D, then we cannot deduce that ABC and DEF are congruent. However, there are a few special cases in which...
*February 24, 2014 by John*

**Math**

Natalia constructed a right triangle with two side lengths measuring 3 and 5 units. She constructed a second right triangle similar to the first one, with the two corresponding sides measuring 5.1 and x units in length, respectively. What is the missing length, x, of the ...
*December 15, 2014 by Raylin*

**physics/alegbra**

Find the tension in cable A A if w 1 w_1 = 54.0N N and w 2 w_2 = 120N in a downward triangle 60degress on (both sides of angel and at the end of the triangle is w1 a and then w2) how would I solve this equation I don't have a glue where to start. Your help is appreciated.
*October 6, 2013 by deb*

**Math**

1) Which of the following ingegers can not represent the lengths of the sides of a triangle? (9,10,11) (4.7,9) (4,8,12) & (6,6,11) Try drawing the 4,8,12 triangle. Have fun. any two sides must be longer than the third. Example with set 1. 9+10>11 10+11>9 11+9>10
*February 23, 2007 by Peggy*

**math**

you start with an equilateral triangle and then trisect each of the sides with a new equilateral triangle on the middle third of each trisection, repeat the process indefinitely how would you prove that the perimeter is infinite?
*February 8, 2009 by alex*

**geometry**

A piece of property is in the form of a right triangle with sides which are 300 meters and 1200 meters in length. What is the area of this triangle in hectares, correct to the nearest whole hectare?
*November 8, 2009 by kimama*

**7th grade math Pygorean Theroem Ms.Sue please**

Explain if a triangle with the given lengths is a right triangle. 1. 18, 24, 30 2. 7, 24, 25 3. 13, 14, 15 I really do not know how to solve these problems! I have no idea how!!!! Please help!
*October 17, 2012 by Delilah*

**math**

A right triangle is formed in the first quadrant by the x- and y-axes and a line through the point (2,3). Draw a figure that illustrates the problem. What is the area of the triangle A as a function of the x-intercept of the line?
*October 22, 2012 by sarah*

**math**

Do a two column proof. Given: HI=FG Prove: GH>FI If FGI is a triangle,and GIH is a triangle, and they both share a common side, GI, and FIH is a straight line, how do you prove the answer?
*December 17, 2012 by Ryan*

**Algebra**

What is the value of b in the triangle shown below? the trianle they show is a right triangle and the length shows 3b...the width just shows b...and the inside says 24 in^2 A.4 in B.4 in C.4 in D.no solution I think i is B..but its a guess..?
*February 24, 2013 by Cassie*

**math**

a farmer wishes to fence a field in the form of a right triangle.If one angle of the right triangle is 43.2 degree,and the hypotenuse is 200yard,find the amount of fencing neede.
*February 20, 2014 by rhodora*

**geometry**

the bases of isosceles trapeziod abcd are 17 and 25cm and its base angles are 45 degrees. find the height of the trapezoid
*September 13, 2011 by lakyn *

**Geometry**

How many distinct isosceles triangles exist with a perimeter of 99 inches and side lengths that are positive while numbers?
*February 16, 2014 by Kristen*

**Geometry**

Which point of concurrency in a triangle is the point of intersection of the three altitudes of a triangle?
*October 8, 2009 by Paul*

**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?
*October 4, 2010 by Anonymous*

**geometry**

If the sides of a triangle are in the ratio 3:4:5 and the perimeter of the triangle is 72 inches what are the lengths of the sides?
*November 30, 2010 by Debbie*

**math**

the area of a triangle is 90 square meters and the height is 12 meters. What is the base of the triangle?
*March 7, 2011 by Bluestarr*

**geometry**

The coordinates of the vertices of a triangle are A(1,3), B(6,10), and C(11,18). Find the perimeter of the triangle when the coordinates are multiplied by 3.
*August 21, 2011 by Luke Phillips*

**geometry**

An equilateral triangle has sides that measure 5x+3 units and 7x-5 units. What is the perimeter of the triangle?
*November 8, 2011 by Julie*

**geometry**

in triangle abc angle a is (3x+40) angle b is (8x+35) and c is 10x what is the longest side of the triangle
*February 7, 2012 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*

**George Carver**

If the length or the triangle is 35 and the base is 53 what is the length of the other side of the triangle.
*March 20, 2013 by Angel*

**Geometrey**

A right triangle has perimeter equal to 80 and hypotenuse equal to 34. What is the area of the triangle?
*May 1, 2013 by David Kroell*

**Math PLZ help **

A 306090 triangle has a hypotenuse with a length of 18. What is the length of the shorter leg of the triangle?
*February 14, 2014 by dark1*

**Geometry**

The vertices of a triangle are P(-3,8), Q(-6, -4), and R (1, 1). Name the vertices of R (smaller letters)y-0 (triangle PQR). A. P'(-3, 8), Q'(-6,-4), R'(1,1) B. P'(-3,-8), Q'(-6,4), R'(1,-1) C. P'(3,-8), Q'(6,4), R'(-1,-1) D. P' (3,8), Q'(6,-4), R'(-1,1)
*March 26, 2014 by Sierra*

**math**

The altitude of equilateral triangle ABC is 15. What is the length of a side of triangle ABC?
*May 9, 2015 by Tameka*

**geometry**

The altitude of equilateral triangle ABC is 15. What is the length of a side of triangle ABC?
*May 10, 2015 by Tameka*

**MATH PRACTICE**

Triangle ABC has Coordinates A(-6,0) B(-2,0) C(-2,-7). What is the APPROXIMATE Perimeter of Triangle ABC?
*May 21, 2015 by OG KOALA*

**GEOMETRY URGENT PLEASE**

(imageshack)(.)us(/)photo (/) my-images (/)42(/)2vja. jpg(/) Open that link please , just delete the parentheses please please help me with my assignments I beg you cooperate with me huhu 1. in the figure , the areas of traingle cef, triangle abe, triangle adf are 3,4, and 5 ...
*November 9, 2013 by BARBIE LEE *

**Trigonometry/Geometry**

In most geometry courses, we learn that there's no such thing as "SSA Congruence". That is, if we have triangles ABC and DEF such that AB = DE, BC = EF, and angle A = angle D, then we cannot deduce that ABC and DEF are congruent. However, there are a few special cases in which...
*November 19, 2013 by Sam*

**Algebra 1**

Traingles C and D are similar. The area of triangle Cis 47.6in2. The base of triangle D is 6.72in. Each dimension of D is 6/5 the corresponding dimension of C. What is the height of D? How in the world do you this problem!! Please help BIG TEST TOMMOROW!!! :)
*November 7, 2007 by Grace*

**geometry**

In the diagram below, the length of the legs AC and BC of right triangle ABC are 6cm and 8cm, respectively.Altitude CD is drawm to the hypotenuse of triangle ABC. what is the lenght of AD to the nearest tenth of a centimeter?
*June 16, 2010 by Jacqueline*

**pre calc**

the longest side of a triangle is 34 feet. the measures of two angles of the triangle are 40 and 65 degrees. find the lengths of the other two sides using law of sines and cosines
*April 28, 2011 by g*

**maths**

THE Perimeter of a triangle is 2004. One Side of a triangle = 21 Times the other. the shortest side is integral length. SOLVE For lengths of the sides of the traingle in every possible case.
*December 31, 2012 by sonia*

**Math (Pre-Cal)**

There is exactly one triangle the length of whose sides are integers in arithmetic progression and whose area is 156 square units. Find the perimeter of this triangle.
*February 11, 2013 by Dan*

**math**

The lower leg of a right triangle is 8 cm in length. Calculate the other two knowing that the sides of the triangle form an arithmetic sequence. please give me step by step answers thanks
*June 3, 2013 by saraah*

**math**

a) What is the area of the tri-angle determined by the lines y= − 1/ 2x + 5,y =6x and they-axis? (b) If b > 0 and m < 0, then the line y = mx +b cuts off a triangle from the first quadrant. Express the area of that tri-angle in terms ofm andb. (c) The lines y = mx...
*October 2, 2011 by Ron*

**math**

M and N are the midpoints of the sides of a square. What is the ratio of the area of triangle AMN to the area of the complete square? But the answer has to be in a ratio which is the area of a triangle to the area of the complete square. Also the triangle is in the square at ...
*May 19, 2012 by alandra*

**math**

the height of a triangle is 4 inches greater than twice its base. the area of the triangle is 168 square inches. what is the base of the triangle? Area=1/2 B*H= 1/2 B (2B+4) solve for B h = 4 + 2b b = ? A = (b*h)/2 = 168 168 = [b(4+2b)]/2 168 = (4b + 2b^2)/2 336 = 4b + 2b^2 2b...
*April 26, 2007 by help me again(last one)*

**MATH**

I have a square that is divided into 2 triangles. In the middle of the top triangle there is this: 62 in. and at the bottom corner of the same triangle it says 45 degrees. Could some explain to me how to find the area annd the perimeter? I'm not sure what I'm supposed to do ...
*September 2, 2009 by Anonymous*

**Math**

I'm in 5th grade and here's my question: I have to write which fraction represents the ratio of corresponding sides? There are 2 triangles. One triangle has the measurements 3in., 9in. and 6in. The other triangle is 18in., 54in. and 36in. Thank you.
*March 5, 2012 by Isabelle*

**geometry PLEASE**

imageshack(.)(us)/photo/my-images/42/2vja.jpg/ Open that link please , just delete the parentheses please please help me with my assignments I beg you cooperate with me huhu 1. in the figure , the areas of traingle cef, triangle abe, triangle adf are 3,4, and 5 respectively. ...
*November 10, 2013 by BARBIE LEE *

**algebra2**

you are creating a window display at a toy store using wooden blocks. the display involves stacking blocks in triangular forms. you begin to display with 1 block, which is your first "triangle," and then stack three blocks, two on the bottom and one on the top, to get the next...
*October 12, 2011 by jaydene*

**GEOMETRY **

Here are the figures. file:///C:/Users/ALIZAJOY/Pictures/Untitled.png 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 ...
*November 6, 2013 by Barbie Lee *

**Chemistry Help!!**

Determine triangle H when 10g of HN3 are reacted in teh following reaction: 4HN3 + 2NO2 arrow pointing > 2H202 + 7N2 (note: triangle Hf for HN3 = +267.1 kJ Equation? Answer? Thanks
*May 20, 2010 by Anonymous*

**Precalc**

Okay for this question I know I am supposed to use the law of sines. But how can i tell what side is what? In right triangle ABC, a = 120 and c = 140, and C is the right angle. Solve the triangle. Round to the nearest tenth, if necessary.
*August 5, 2011 by anna*

**Algebra**

The flower garden has the shape of a right triangle. 5ft of a perennial border forms the hypotenuse of the triangle, and one leg is 1ft longer than the other leg.Find the lengths of the legs.
*November 9, 2011 by Kelly*

**maths-urgently needed**

In right angled triangle ABC angle B=90 degree and AB= root 34 unit. The coordinates of point B and Care (4,2)and (-1,y) respectively. If area of triangle ABC = 17 sq.units, then find value of y.
*February 12, 2013 by Anonymous*

**Geometry.**

prove that the distance between any two points inside triangle abc is not greater than half the perimeter of triangle abc my teacher said to try doing this proof by contradiction. can someone please help??
*December 19, 2013 by Sammy*

**math12A TRIG pleas help**

a farmer wishes to fence a field in the form of a right triangle.If one angle of the right triangle is 43.2 degree and the hypotenuse is 200yard,find the amount of fencing needed.
*February 20, 2014 by Anonymous*

**Math HELP!**

Sylvia made a poster shaped like the triangle shown below. The hypotenuse is 26in. one like is is 24 in. and the bottom leg is blank. What is the length of the the third side of the triangle? A. 10 in. B. 12 in. C. 14 in. D. 16 in. Is the answer D? Thank you
*November 5, 2014 by Callie*

**Geometry **

Two triangles are similar. The ratio of their areas is 1:4. If the height of the smaller triangle is 3 cm, how long is the corresponding height of the larger triangle, in centimeters? does this mean that i just multiply the numbers of the sides by four?
*April 1, 2015 by G*

**Math**

In parallelogram PQRS, diagonals PR and QS intrsect at M. Which is always true? (1) PR is perpendicular to QS (2) PM is congruent to RM (3) PQ is congruent to QR (4) triangle PMS is congruent to triangle PMQ
*March 7, 2010 by Sarah*

**MATHS-traingles**

one of the exterior angles of a triangle is 126 degree and the interior opposite angles are in the ratio 2:4. Find the angles of the triangle.
*March 2, 2013 by anchal*

**11th grade math**

in triangle DEF,<D=50 degree, DE=14 meters, and DF=10 meters. find the area of triangle DEFto the nearest tenth of a square meters
*April 7, 2013 by Alex*

**circle geometry triangles**

how do u construct a circle that is circumscribed of a triangle? how do u constuct a circle that is inscribed in a triangle? i am a bit confused and I have finals next week!
*December 11, 2010 by Skylar*

**math**

each side of equilateral triangle is 5 cm shorter than the side of square. the sum of the perimeters of the two figures is 251 cm. how long is each side of the triangle? solution pls.
*January 13, 2015 by Seohyun*

**Math**

A triangle with a Base of 8 inches and a height of 7 inches has a circular section of diameter 3 inches removed from its center. What is the remaining area of the triangle? (Use π = 3.14)
*April 30, 2015 by Preia*

**Math**

A triangle with a Base of 8 inches and a height of 7 inches has a circular section of diameter 3 inches removed from its center. What is the remaining area of the triangle? (Use π = 3.14)
*April 30, 2015 by Preia*

**geometry**

given: segment AB is paralell to segment DC; segment AB is congruent to segment to DC prove: triangle ABC is congruent to triangle CDA statements: 1. segment AB is congruent to segment DC 2.segment AC is congruent to segment AC 3.segment AB is paralell to segment DC 4.angle ...
*November 5, 2007 by hello*

**algabra 2**

One side of a triangle is 4 cm longer than the shortest side and 2 cm shorter than the longest side. The perimeter is 38 cm. Find the dimensions of the triangle.
*October 3, 2010 by Lily*

**geometry**

The area of a triangular garden can be no more than 120 feet square feet. The base of the triangle is 16 feet. What is the height of the triangle?
*August 31, 2011 by Samantha *

**math**

The ratio of the corresponding sides of two similar triangles is 3:2. The sides of the larger triangle are 15 cm, 24 cm, and 27 cm. What are the lengths of the sides of the smaller triangle?
*April 11, 2011 by Kylie*

**Math**

in triangle DEF,<D=50 degree, DE=14 meters, and DF=10 meters. find the area of triangle DEFto the nearest tenth of a square meters
*April 7, 2013 by Alex*

**Algebra 1**

each side of an equilateral triangle is 4 cm shorter than twice the length of each side of a square. their perimeter are the same. how long is each side of the triangle?
*August 30, 2014 by Anonimous*

**math **

The area of a triangle is 600 square feet. Find the altitude, in feet, of the triangle if the length of the corresponding base is 30 feet.
*March 26, 2015 by Sean *

**geometry**

The height of triangle ACE is 12 and base AE=20. A rectangle is inscribed in triangle ACE as shown in the diagram a) express the rectangle's area as a function of x and y b)Use the fact that triangle ACE is similar to BCD to write y as a function of x. c)express the rectangle'...
*August 30, 2011 by jay*

**Trig**

The lengths of segments PQ and PR are 8 inches and 5 inches, respectively, and they make a 60-degree angle at P. (a) Find the area of triangle PQR. (b) Find the length of the projection of segment PQ onto segment PR. (c) Find the length of segment QR. (d) Find the sizes of the...
*April 17, 2010 by Sarah*

**algebra**

The shorter side of a triangle is 5 inches less than the medium size side. The larger side is 12 inches more than the medium size side. If the perimeter of the triangle is 40 inches, find the size of each side of the triangle. Show your work
*December 16, 2009 by Agnes*

**physics (geography bit)**

Thanks for the help guys!!! I really appreciate it!!! ok I drew the thing as caerfully as I good h t t p : / / i m g 3 7 . i m a g e s h a c k . u s / i m g 3 7 / 7 8 0 7 / f i r s t d w s . j p g ok I redrew it chekc it Ok I followed the directions and made a line through the...
*August 10, 2009 by physics (geography bit)*

**physics (geometry bit)**

Thanks for the help guys!!! I really appreciate it!!! ok I drew the thing as caerfully as I good h t t p : / / i m g 3 7 . i m a g e s h a c k . u s / i m g 3 7 / 7 8 0 7 / f i r s t d w s . j p g ok I redrew it chekc it Ok I followed the directions and made a line through the...
*August 11, 2009 by physics (geometry bit)*

**Maths**

An equilateral triangle with side length 33 is divided into 33^2 smaller unit equilateral triangles each with side 1, forming a triangular lattice. We color each segment of length 1 either Red, Blue or Green, subject to the condition that each small unit equilateral triangle ...
*May 1, 2013 by Maths lover Please Help...*

**Math**

1.What is the volume of the figure above if a = 6 units and b = 9 units? A. 1,620 cubic units B. 540 cubic units C. 324 cubic units D. 342 cubic units 2.Susan is building a cage for her rabbit and started by making the supports for the cage as shown below, where a = 14 inches...
*April 20, 2015 by Kate*

**Geometry**

The lengths of the sides of a triangle are 3,5, and 7 inches. How many inches long is the shortest side of a similar triangle that has a perimeter of 75 inches? F.10 G.12 H.14 H.15 k.22
*December 7, 2012 by Lisa*

**GEOMETRY CIRCLES **

1. Ab is a chord of a circle with center o and radius 52 cm . point m divides the chord ab such that am = 63 cm and mb=33 cm find om 2. A circle is inscribed in a triangle whose sides are 10, 10 and 12 units . a second smaller circle is inscribed tangent to the first circle ...
*December 10, 2013 by Talon*

**Geometry**

If the perimeter of a triangle is 12, which of the following could be the length of one side of the triangle? a. 8 b. 7 c. 6 d. 5 Would the correct answer be d. 5? And how do you go about answering this type of question? I just guessed; I figured it was the smallest number.. ...
*May 10, 2009 by Anonymous*

**Geometry**

I having diffucltly with this triangle.This trangle angles are 3x,4x,x.You have to solve for x.I know you have to use the triangle sum therom.I got 7x=180.That would equal a decimal point which is not right.It has to be whole number.
*July 4, 2011 by Anonymous*

**math**

I have a triangle in a coordinate system(not native english) i have these three points. A: 4,-2 B:-2,-1 C: 4,3 How do i get the height of it in relation BC? And, how do i calculate the total area of the triangle? Made this atm: AB: ((-2)-4)/((-1)-2) = 2; y-2=2(x-1) y = 2*x; BC...
*November 23, 2011 by Emil*

**GEOMETRY**

Find the exact length of the altitude drawn to the hypotenuse. Do not round. The triangle is not drawn to scale. A triangle with base measures of 9 & 17. Draw a diagram. Using similar triangles, we know that h/9 = 17/370 I need more help with this. Thank you
*February 13, 2015 by Anonymous*

**Geometry about the circles **

1. Ab is a chord of a circle with center o and radius 52 cm . point m divides the chord ab such that am = 63 cm and mb=33 cm find om 2. A circle is inscribed in a triangle whose sides are 10, 10 and 12 units . a second smaller circle is inscribed tangent to the first circle ...
*December 9, 2013 by Talon*

**Geometry about the circles **

1. Ab is a chord of a circle with center o and radius 52 cm . point m divides the chord ab such that am = 63 cm and mb=33 cm find om 2. A circle is inscribed in a triangle whose sides are 10, 10 and 12 units . a second smaller circle is inscribed tangent to the first circle ...
*December 10, 2013 by Talon*

**geometry**

find the value of x. triangle xyz 2x, 4x+1, and 2x+3 perimeter of triangle xyz=88
*December 15, 2009 by mac*

**Geometery **

I need to know the laws of triangle inequality. i need help what is triangle in equality?
*January 6, 2010 by Francesca*

**geometry**

If the perimeter of the smaller triangle is 4cm, what is the perimeter of the larger triangle?
*February 20, 2011 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*

**Geometry**

If (triangle)IGH is congruent to (triangle)KLJ, then <H is congruent to ___
*March 6, 2014 by Kylee*

**Mathematics**

A 306090 triangle has a hypotenuse with a length of 18. What is the length of the shorter leg of the triangle?
*March 10, 2014 by CrazyCraft Mod Pack + OreSpawn = FUN! XD*

**Algebra**

A triangle has the side lengths of 5 inches 12 inches and 15 inches every demention is multiplyed by 1/5 to form a new triangle how is the ratio of the perimeters related to the ratios corresponding sides?
*October 25, 2010 by Joelseph *

**Math**

One side of the triangle is 2cm longer than the second side. The third is 3/5 as long as the first side. If the perimeter of the triangle is 24cm, Find the lengths of the three sides.
*September 12, 2011 by Roland Lewis Santos*

**math**

Triangle ABC is an equilateral triangle with side length AB=22. Place a point D on the line segment BC. Extend BC to the point E such that BD=CE. point E is defined as lying on BD and satisfying BD=CE.What is the value of DE?
*June 16, 2013 by Anonymous*