Sunday

October 4, 2015
Number of results: 11,924

**math**

angle ABC and DEF are supplementary angles. the measure of DEF is 20 degrees less than 3 times the amount of ABC. what are ABC and DEF.
*January 24, 2013 by hunter*

**geometry**

DEF and ABC are complementary angles and ABC is nine times as large as DEF. Determine the measure of each angle.
*June 27, 2012 by angela *

**GEOMETRY**

If ABC ~ DEF and the scale factor from ABC to DEF is 1/6, what are the lengths of DE,EF , and DF, respectively?
*February 26, 2014 by QUILO*

**geometry**

Triangle ABC is similar to triangle DEF. The sides of ABC are 5,8 and 11. What is the length of the shorttest side of DEF if its perimeter is 60?
*June 18, 2013 by mily*

**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*

**geometry**

<DEF and <ABC are supplementary angles and <DEF is seven times as large as <ABC. Determine the measures of each angle. Students must show all work step by step to receive full credit.
*March 10, 2011 by Terri Search *

**algebra**

Triangles ABC and DEF are similar. Find the area of triangle ABC. Round your answer to the nearest tenth. the answer should be __________m^2 triangle abc has a 12m. triangle def has 12m and 18m.
*March 9, 2013 by sally*

**Algebra**

Triangles ABC and DEF are similar. Find the area of triangle ABC. Round your answer to the nearest tenth. Triangle ABC has a base of 12m. Triangle DEF has a base of 18m and height of 12m
*May 7, 2014 by Barb*

**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*

**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**

If triangle ABC is similar to triangle DEF and the perimeter of ABC is 4 times greater than the perimeter of DEF , what is the relationship between the areas of the triangles?
*July 12, 2012 by DAN*

**geometry**

In similar triangles ABC and DEF, corresponding sides AB and DE equal 15 and 12, respectively. If the perimeter of triangle ABC=40, what is the perimeter of triangle DEF
*September 28, 2010 by Saw Phone Thet*

**algebra**

Triangles ABC and DEF are similar. Find the perimeter of triangle DEF. Round your answer to the nearest tenth.
*March 1, 2013 by sally*

**geomerty**

The following triangles, Ä ABC and Ä DEF, are congruent. abc 67.38degree 12cm lenght 22.62degree b5cm,l,13cm Find the lengths of all missing sides and measures of all angles for both triangles. Include correct units with each of your answers. First triangle: Second triangle: ...
*May 11, 2011 by kozy*

**Trigonometry/Geometry - Law of sines and cosines**

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 21, 2013 by Sam*

**Math**

How do I determine which two triangles on a graph are congruent. ∆QRS and ∆DEF or ∆ABC and ∆XYZ. i found the coordinates of both sets: QRS Q(-2,5), R(-2,1), S(-5, 1) DEF D(5,-5), E(5,-2), F(2,-2) or ABC A(4,5), B(6,2), C(2,2) XYZ X(-4,-5), Y(-6,-2), Z(-...
*December 30, 2014 by Marie*

**geometry**

if <def < abc then <def <abc
*October 14, 2009 by vanessa*

**MATH**

I entered the wrong coordinates in a previous question, i corrected down below. How do I determine which two triangles on a graph are congruent. ∆QRS and ∆DEF or ∆ABC and ∆XYZ. i found the coordinates of both sets: QRS Q(-2,5), R(-2,1), S(-5, 1) DEF D(5...
*December 31, 2014 by Marie*

**Math Geometry**

Geometry Question: Prove the symmetric Property for congruence of triangles. Given: ∆ABC≅ ∆DEF Prove: ∆DEF≅ ∆ABC
*May 18, 2011 by Reigel*

**geometry**

Suppose right triangle ABC has one acute angle 47º. Suppose also that right triangle DEF has an acute angle 43º. How are triangles ABC and DEF related?
*September 20, 2011 by Blanca*

**algebra**

Triangles ABC and DEF are similar. Find the perimeter of triangle DEF. Round your answer to the nearest tenth. ab=4ft bc=6ft ac=5ft de=6ft ef= 9ft there is no feet given for df Please can anyone help me solve this with steps I don't understand how to do this. Thanking you in ...
*March 1, 2013 by sally*

**Math**

Reiny ..thanks for the formula and example. I tried it and i get that both sets of triangles are congruent but it is multiple choice with one answer. I dont know what i am doing wrong. How do I determine which two triangles on a graph are congruent. ∆QRS and ∆DEF ...
*January 1, 2015 by Marie*

**math**

The base of triangle ABC is one half the altitude.The altitude of triangle DEF is one half its base. If both triangles are equal in area, what is the ratio of the altitude of triangle ABC to the altitude of triangle DEF ? a. 1:4 b. 1:2 c. 1:1 d. 2:1 e. 4:1 please answer and ...
*April 19, 2014 by thomas*

**math**

The base of triangle ABC is one half the altitude. The altitude of triangle DEF is one half its base. If both triangles are equal in area, what is the ratio of the altitude of triangle ABC to the altitude of triangle DEF? a. 1:4 b. 1:2 c. 1:1 d. 2:1 e. 4:1 please answer and ...
*April 24, 2014 by thomas*

**Geometry.**

Triangles ABC and DEF are similar. If ∠ABC = 121°and ∠BCA = 35°, find the measure of angle FDE.
*June 3, 2015 by Summer.*

**geometry**

"Triangle DEF is similar to triangle ABC, and the length of side DE is 6 cm. The length of side AB is 2 cm. If the area of triangle ABC is 5 square cm, what is the area of triangle DEF?
*July 6, 2011 by Anonymous*

**geometry**

ABC is congruent to DEF AB = 11, BC = 14, CA = 20, FD = 4x - 12 Find x
*November 20, 2011 by T*

**Math: Finding m<A**

ABC~DEF m<B = 25', m<D = 45', m<E = 25' How do find m<A?
*March 29, 2013 by Michelle*

**Math**

I have 3 questions: 1) If ABC and DEF are three- digit numbers, which of the following could be the number of digits in the product of ABC and DEF? i. 4 ii. 5 iii. 6 I don't have the vaguest idea on how to do this and what type of math it is part of... My answer is 6 only but ...
*July 8, 2014 by Bethany*

**math**

Triangles ABC and DEF are similar. The similarity ratio of to is , AB = 40, BC = 25, and AC = 35. What is the perimeter of ?
*May 22, 2013 by angie*

**Math**

Find the missing sides of the similar triangles ABC and DEF. AC=2 AB=5 CB=? DF=4 FE=8 DE=?
*November 13, 2013 by Heather*

**Math (Geometry)**

The perimeter of right triangle ABC is equal to the perimeter of isosceles triangle DEF. The lengths of the legs of the right triangle are 6 and 8. If the length of each side of the isosceles triangle is an integer, what is the greatest possible length for one of the sides of ...
*August 7, 2012 by ANONYMOUS*

**UPDATE to Ms Sue**

If JKL is similiar to DEF and JKl has sides that are 11 times greater than those of DEF what is the relationship between the perimeters of the triangles A. They are equal. B.The perimeter of DEF is 11 times greater than the perimeter of JKL. C. The perimeter of JKL is 11 times...
*June 13, 2012 by Katie*

**dav**

the area of two similar triangle abc nd def are 15cm.sq nd 25cm.sq respectively.find the ratio of corresponding side
*September 15, 2014 by richa das*

**Geometry**

Given: Triangle ABC ~ Triangle DEF, m<A = 50o, m<D = 2x + 5y, m<F = 5x + y, and m<B = 102 - x. What is the measurement of <F?
*March 14, 2011 by mic*

**Geoometry Help: Find EF**

ABC~DEF AB = 36, BC = 24, DE = 48 m<B = 110', m<E = 110' EF = ? I think it's 68. Yes? Or is something else?
*March 29, 2013 by Michelle*

**maths**

D,E,F are the midpoints of a triangle ABC then what is the area of triangle DEF?
*March 26, 2012 by help me out it's urgent*

**geometry**

describe the 2 transformations, the first followed by the second that combined will transform triangle ABC and triangle DEF. 23) A(-3,3), B(-3,1), C(0,1) D(6,6), E(6,2), F(0,2) 24)A(6,0), B(9,6), C(12,6) D(0,3), E(1,5), F(2,5)
*December 19, 2011 by Anonymous*

**Geometry**

If ∆ ABC ~ ∆ DEF, BC = 12 cm, EF = 10 cm, and AC = 18 cm, find DF.
*January 11, 2011 by Dave*

**Math**

If ∆ ABC ~ ∆ DEF, BC = 12 cm, EF = 10 cm, and AC = 18 cm, find DF.
*January 12, 2011 by James*

**geometry**

In the accompanying diagram, triangle ABCis similar to triangle DEF, AC = 6, AB = BC = 12, and DF = 8. Find the perimeter of triangle DEF. it an isoslese triangle 6 and 8 are both base my work 6+2=8 12+2=14 2(14)+6=p 24+6=28 I don't understand how to find the perimeter of ...
*July 16, 2015 by Samantha*

**English**

What could I use as a memory clue (or picture) for the following words? Evicted: Def. To force out. Requisitioned: Def. Demand, or urgently ask for something for military needs.
*August 23, 2008 by Tommy*

**English**

What could I use as a memory clue (or picture) for the following words? Requisitioned: Def. Demand, or urgently ask for something for military needs. Derogatory: Def. To make a remark that belittles someone else
*August 24, 2008 by Tommy*

**math**

Triangle DEF with vertices D(2,5), E(1,-6), and F(-5,3) is translated 3 units right and 2 units down. Find the coordiantes of DEF.
*November 13, 2008 by Sha*

**math**

Right triangle DEF has sides that measure x, x, and x squared for the some value of x. What is the area of triangle DEF to the nearest 0.1 square unit?
*April 20, 2014 by Melissa *

**math (need help badly)**

the vertices of triangle DEF are D(5,12)and E(2,7) and F(8,4) Triangle DEF undergoes an enlargement with the centre ,O, and scale factors k.Its image is D`E`F` where D(5,12)arrow D`(7.5,18) a)How do i detremine the value of k
*May 23, 2008 by rita*

**geometry**

Complete the flow proof for a Hypotenuse-Angle Theorem. Given AC congruent DF, <C congruent <F. <B and <E are right angles. Prove triangle ABC congruent triangle DEF. Thanks for tutors.
*April 10, 2015 by chloe*

**Geometry**

ABC is an acute triangle with \angle BCA = 35 ^\circ. Denote the circumcenter of ABC as O and the orthocenter of ABC as H. If AO=AH, what is the value of \angle ABC (in degrees)?
*March 26, 2013 by Dan*

**maths**

ABC is an acute triangle with \angle BCA = 35 ^\circ. Denote the circumcenter of ABC as O and the orthocenter of ABC as H. If AO=AH, what is the value of \angle ABC (in degrees)?
*March 30, 2013 by rohit*

**maths**

ABC is an acute triangle with ∠BCA=35∘. Denote the circumcenter of ABC as O and the orthocenter of ABC as H. If AO=AH, what is the value of ∠ABC(in degrees)?
*March 30, 2013 by stranger*

**geometry**

In the accompanying diagram, triangle ABCis similar to triangle DEF, AC = 6, AB = BC = 12, and DF = 8. Find the perimeter of triangle DEF.
*July 16, 2015 by Anonymous*

**TO BOBPURSLEY**

def of average velocity = t^-1 (x - x0) (average velocity = t^-1(x-x0))t=(avearge velocity)t + x0= x - x0 + x0 = x = (average velocity)t + x0 x = (average velocity)t + x0 def of average velocity were costant acceleration is assumed = 2^-1(v0 + v) plug into x = (average ...
*June 18, 2009 by TO ]BOBPURSLEY*

**Physics**

def of average velocity = t^-1 (x - x0) (average velocity = t^-1(x-x0))t=(avearge velocity)t + x0= x - x0 + x0 = x = (average velocity)t + x0 x = (average velocity)t + x0 def of average velocity were costant acceleration is assumed = 2^-1(v0 + v) plug into x = (average ...
*June 19, 2009 by Physics*

**math**

Write a sequence of transformations that maps triangle ABC onto triangle A''B''C''. --------------------------------------… A in ABC is 1,9, B in ABC is 3,12, and C in ABC is 4,4. A'' in A''B''C'' is 3,-3, B'' in A''B''C'' is 5,-6, and C'' in A''B''C'' is 6,2.
*January 23, 2013 by kayla*

**Geometry **

Let ABC be any triangle. Equilateral triangles BCX, ACY, and BAZ are constructed such that none of these triangles overlaps triangle ABC. a) Draw a triangle ABC and then sketch the remainder of the figure. It will help if (triangle) ABC is not isosceles (or equilateral). b) ...
*March 19, 2015 by G*

**math, functions **

stefan has set up a right triangle EFG on the side of a river such that FG measures 20m and angle DEF measures 60 degrees. EG bisects angle DEF. determine the width of DG.
*November 20, 2011 by yess *

**def integrals**

find value of def integral with a=-2 and b=2sqrt(3) for integral i get 1/15 *((4+x^2)^(3/2)) (-8+3x^2) for value i get [1536- 64sqrt(2)]/15 but its' wrong. help please
*May 25, 2013 by Mikey*

**Geometry**

if m<GEF = 2x + 10, m<DEF = 5x- 10, and m<GED = 70, find m<GEF and m<DEF
*March 2, 2014 by Kylee*

**Math**

if m<GEF = 2x + 10, m<DEF = 5x- 10, and m<GED = 70, find m<GEF and m<DEF
*March 3, 2014 by Kylee*

**MATH**

what is the relationship between the perimeters of the triangles A. They are equal. B.The perimeter of DEF is 11 times greater than the perimeter of JKL. C. The perimeter of JKL is 11 times greater then DEF. D. The perimeter of JKL is 121 times greater that DEF.
*June 13, 2012 by Katie*

**Update**

what is the relationship between the perimeters of the triangles A. They are equal. B.The perimeter of DEF is 11 times greater than the perimeter of JKL. C. The perimeter of JKL is 11 times greater then DEF. D. The perimeter of JKL is 121 times greater that DEF.
*June 13, 2012 by Katie*

**Geometry**

Angle DEF is similar to Angle HJK and the scale factor of angle DEF to anle HJK IS 5/2. If EF =15 FIND JK Here is what I came up with Am I correct 5/2 = EF/JK 5/2 =15/JK 5(JK)=30 JK=30/5 JK=6 Thanks much
*June 13, 2007 by DANIELLE*

**Math**

If triangle ABC is similar to triangle DEF and the scale factor is 1:2 correspondingly, what is the measure of angle D is the measure of angle A is 45 degrees? Explain how you determined the measure of angle D.
*January 24, 2013 by Lalala*

**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-PLEASE CHECK ANSWERS!**

In isosceles triangle DEF, DE=DF. Which of the following is true? 1) <D is congruent to <E 2) <F is congruent to <E 3) <D is congruent to <F 4) <D is congruent to <E which is congruent to <F Is the answer (3)? In triangle ABC, if line AB is congruent...
*February 23, 2010 by Laurie*

**6th grade vocab**

What does the word "predominant" mean? Oh and please don't give me a website with some big def. I am in 6th grade so I won't understand if the def. is big and long. It also helps if you use it in a sentence . . . just saying. :-D Thanks so much!
*April 13, 2009 by Noelle*

**geometry**

Triangle ABC is congruent to triangle DEF. If the length of AB is 12 feet and the length of AC is 10 feet. Find the length of DE. can someone please help me on this question please and thank youu :)
*September 3, 2011 by Alexis*

**math (answer check)**

The coordinates of two vertices of triangle DEF are D(-5,5) and E(9,8). Determine two possible coordinates for for F that would make DEF a right triangle ? ans: slope DE = 8-5 / 9 - (-3) = 3/12 I don't know this part :how to Determine two possible coordinates for for F that ...
*March 12, 2015 by alex*

**Math**

Prove that if the sides of one angle are parallel to the sides of another angle, the angles are congruent. Given: BA||ED, BC||EF, AND BEG Prove:angle ABC is congruent to angle DEF
*March 3, 2015 by Serenity *

**math**

Point A and B of a triangle ABC are at (-1,1) and (3,9), respectively; while point C is on the parabola y=x2. Find coordinate of C so that the area of ABC is minimum, and calculate the largest are of ABC.
*August 10, 2012 by rolan*

**simple GEOMETRY!!**

In triangle ABC, ∠ABC=30∘,∠ACB=60∘. D is a point in triangle ABC such that DB and DC bisect angles ABC and ACB respectively. What is the measure (in degrees) of ∠BDC?
*March 19, 2013 by please..anyone help!!*

**Geometry**

The scale factor of triangle DEF to triangle HJK is 5/2. If EF =15 find JK EF : JK = 5 : 2 15 : JK = 5 : 2 15 * 2 = JK * 5 30 = 5(JK) 5(JK) / 5 = 30 / 5 JK = 6 Am I CORRECT ON THIS ONE? Looks like EF and JK are corresponding sides of similar triangles. Each side of DEF is 2.5 ...
*June 18, 2007 by DANIELLE*

**Geometry**

ABC is a right angled triangle with ∠ABC=90∘ and side lengths AB=24 and BC=7. A semicircle is inscribed in ABC, such that the diameter is on AC and it is tangent to AB and BC. If the radius of the semicircle is an improper fraction of the form a/b, where a and b ...
*March 18, 2013 by Stranger*

**Maths**

ABC is a right angled triangle with ∠ABC=90∘ and side lengths AB=24 and BC=7. A semicircle is inscribed in ABC, such that the diameter is on AC and it is tangent to AB and BC. If the radius of the semicircle is an improper fraction of the form a/b, where a and b ...
*March 19, 2013 by Stranger*

**Math**

120 people are given a survey about which television shows they watch. ABC=55 NBC=30 CBS=40 ABC and CBS=10 ABC and NBC=12 NBC and CBS and ABC=5 It wants you to solve for the remaining regions of the circle (mainly what NBC+CBS equal). I know you have to make a venn diagram but...
*April 10, 2013 by Ali*

**prefixes please help thax:]**

these words wont show the right def. when i type it in the dictonary search bar **but i do no u ladys can not do my work for 4 sure But really need help badly i have 11-30 to do and its 9:30 please help anyone thax:] *prefixes* ante arch bi demi equi extra non omin ortho semi...
*October 2, 2008 by Niqua*

**geometry**

can one tell if two triangles are congruent if they are given only the angles and all of them are congruent to one another? (Example below) triangle ABC and triangle DEF with angle A congruent to angle D, angle B congruent to angle E, and angle C congruent to angle F
*October 6, 2008 by Casey*

**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 please help**

In triangle ABC, we have <BAC = 60 degrees and <ABC = 45 degrees. The bisector of <A intersects line BC at point T, and AT = 24. What is the area of triangle ABC? How should i approach this?
*April 2, 2015 by Gem*

**Geometry**

Triangle DEF ~ Triangle HJK, and the scale factor of Triangle DEF to Triangle HJK is 5/2. If EF=15, find JK
*June 16, 2010 by April*

**accounting**

ABC Company uses cash basis accounting for its records. During 2010, ABC collected $400,000 from its customers, made payments of $300,000 to its suppliers for inventory, and paid $140,000 for operating costs. ABC wants to prepare accrual basis financial statements. In ...
*September 9, 2013 by Anonymous*

**Math**

ABC has vertices A(0, 6), B(4, 6), and C(1, 3). Sketch a graph of ABC and use it to find the orthocenter of ABC. Then list the steps you took to find the orthocenter, including any necessary points or slopes you had to derive.
*December 7, 2012 by Bob*

**Geometry PLEASE HELP ME**

ABC has vertices A(0, 6), B(4, 6), and C(1, 3). Sketch a graph of ABC and use it to find the orthocenter of ABC. Then list the steps you took to find the orthocenter, including any necessary points or slopes you had to derive.
*December 11, 2012 by Steven*

**math**

In triangle ABC, AB=2 square root 2, BC=8,angle ABC=45 degrees.Find area ABC. a. 4 square 2 b. 8 c. 8 square 2 d. 16 e. 16 square 2 please answer and explain
*May 9, 2014 by thomas *

**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 ...
*June 6, 2013 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 ...
*June 6, 2013 by clavin*

**HELP!!!!RIGHT NOW!!!!**

Which set of side lengths shows similar triangles? (1 points) A) Triangle ABC : 40, 20, 50; Triangle XYZ: 10, 4, 8 B) Triangle ABC : 30, 20, 60; Triangle XYZ: 40, 60, 90 C) Triangle ABC : 110, 80, 60; Triangle XYZ: 6, 8, 5.5 D) Triangle ABC : 32, 20, 32; Triangle XYZ: 30, 16, 16
*April 29, 2011 by Dezzy*

**geometry**

draw a triangle abc with abc ab =4.5 ,angle abc=35,angle acb=65
*November 26, 2012 by mudit*

**geometry!!!!!!**

ABC is an isosceles triangle with AB = BC. The circumcircle of ABC has radius 8. Given further that AC is a diameter of the circumcircle, what is the area of triangle ABC?
*February 12, 2013 by please help me out!!! please*

**Math**

In triangle ABC, points D,E,F are on sides BC,CA,AB respectively such that AD,BE,CF are angle bisectors of triangle ABC. The lines AD,BE,CF are concurrent at I, the incenter of triangle ABC. If ∠BAC=92∘, what is the measure (in degrees) of ∠EIF?
*May 27, 2013 by John*

**heeeeeeeeeeeeeeeeeeeelp maths**

In triangle ABC, points D,E,F are on sides BC,CA,AB respectively such that AD,BE,CF are angle bisectors of triangle ABC. The lines AD,BE,CF are concurrent at I, the incenter of triangle ABC. If ∠BAC=92∘, what is the measure (in degrees) of ∠EIF?
*May 28, 2013 by andrew*

**maths**

Triangle ABC has an obtuse angle at B, base BC has length equal to 30 and height equal to 24. (This height is taken with respect to base BC). 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...
*June 8, 2013 by keshav*

**geomery**

1. Triangle ABC has a 63.0-degree angle at B, and side AC is 13.6 cm long. What is the diameter of the circle circumscribed about ABC? 2. And: Given any triangle ABC, with sides a, b, and c opposite angles A, B, and C, respectively, what can be said about the three ratios a/...
*April 12, 2010 by Esi*

**geometry**

1. Triangle ABC has a 63.0-degree angle at B, and side AC is 13.6 cm long. What is the diameter of the circle circumscribed about ABC? 2. And: Given any triangle ABC, with sides a, b, and c opposite angles A, B, and C, respectively, what can be said about the three ratios a/...
*April 12, 2010 by Esi*

**9th grade**

given that a(-1,8) ,b(2,4) and if the line y=4 is the axis of symmetry of triangle abc find c.show that triangle abc is an isosceles triangle,calculate the area of triangle abc,calculate the perpendicular distance from a to bc
*March 23, 2010 by anum*

**Math**

Which set of side lengths shows similar triangles? Triangle ABC : 40, 20, 50; Triangle XYZ: 10, 12.5, 10 Triangle ABC : 30, 20, 30; Triangle XYZ: 40, 30, 20 Triangle ABC : 110, 80, 60; Triangle XYZ: 12, 16, 22 Triangle ABC : 32, 20, 32; Triangle XYZ: 40, 26, 26
*March 1, 2013 by Morgan *

**help math**

In triangle ABC, points D,E,F are on sides BC,CA,AB respectively such that AD,BE,CF are angle bisectors of triangle ABC. The linesAD,BE,CF are concurrent at I,the incenter of triangle ABC. If Angle BAC=90, what is the measure (in degrees) of Angle EIF?
*May 28, 2013 by andrew*

**pls help w/t math ?**

in a right triangle ABC, if ab is 14 and bc is 12 wut is bd? there is a pic of a large trangle abc and in it is a line drawn down angle c making it line cd. angle acd then becomes a right trangle as well. i tried working = proportions and pyth thm but i dont seem to be getting...
*July 16, 2007 by shawna*

**math help mepls**

Triangle ABC has an obtuse angle at B, base BC has length equal to 30 and height equal to 24. (This height is taken with respect to base BC). 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...
*June 7, 2013 by clavin*

**maths-constructions**

Construct a rhombus ABCD in which AB= 6 cm and angle ABC= 60degree. Divide it into two triangle ABC and ADC. Construct a triangle AB 'C ' similar to triangle ABC with scale factor 2/3. Draw a line segment C 'D ' parallel to CD, where D ' lies on AD. Is AB 'C 'D ' a rhombus
*February 27, 2013 by Anonymous*