Friday
July 29, 2016

Search: Assume ABC DEF. If DF = 12, EF = 7, and AB = 17, what is the length of DE?

Number of results: 26,673

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
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

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

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
For 2 similar triangles ABC and DEF, the scale factor of ABC to DEF is 2:3. If AB=2(BC) and DE=3(BC), what is EF?
February 10, 2016 by Joe

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

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

Math that needs an answer in the next 5-10 min!!!
Triangle ABC is similar to triangle DEF. Side AB is , and side DE is 6. The scale factor of ABC:DEF is 9. A) TRUE B) FALSE I think its A but I'm not entirely sure... PLZ HELP ASAP!!
February 25, 2016 by Ally

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

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

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
if triangle ABC is similar to triangle DEF and the scale factor is 3, what is the length of side EF if side BC is 6m? triangle ABC is larger.
April 21, 2016 by Georgeth

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 please help!!
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 ∠A=∠D, then we cannot deduce that ABC and DEF are congruent. However, there are a few special cases in which SSA...
July 19, 2016 by Bob

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 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

Math
Which congruence statement says the same thing as triangle ABC is congruent to triangle DEF? (1 point) triangle ABC is congruent to triangle EFD triangle ACB is congruent to triangle DEF triangle ACB is congruent to triangle DFE•• triangle BCA is congruent to triangle FDE ...
February 5, 2016 by Tala

Math
Which congruence statement says the same thing as triangle ABC is congruent to triangle DEF? (1 point) triangle ABC is congruent to triangle EFD triangle ACB is congruent to triangle DEF triangle ACB is congruent to triangle DFE triangle BCA is congruent to triangle FDE
February 1, 2016 by Math, Help Please!

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
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

Geometry
Triangles ABC and DEF are congruent. The length of the line segment AB is 5 yards, the length of the line segment BC is 7 yards, and the length of the line segment CA is 9 yards.
January 23, 2012 by dawn

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
ABC and def are equal both are 5:1 what's edf C is 47° triangle is the shape
December 3, 2015 by Rebecca

Trig
Its a 30-60-90 triangle there's a line in the center that= 10 a. What is the length of the hypotenuse of triangle ABC? b. What is the length of the shorter leg of triangle ABC? c. What is the length of the longer leg of triangle ABC?
February 1, 2012 by BreAnne

Geometry
In the diagram below, the length of the legs AC and BC of right triangle ABC are 6 cm and 8 cm, respectively. Altitude CD is drawn to the hypotenuse of △ABC. What is the length of AD to the nearest tenth of a centimeter?
June 18, 2012 by Alma

Math
Triangles ABC and DEF are similar. Find side AC. Round your answer to the nearest tenth. cm
June 9, 2016 by Irma

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

Math
the right triangle ABC, the altitude from vertex C divides the hypotenuse into two segments, one of length 2 and the other of length 16. Find the perimeter of triangle ABC.
December 7, 2013 by Lily

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

algebra
triangle abc is similar to triangle def and has a ratio 8/10 = 16/20 = 4x+6/4x+11 side ac= ?
January 17, 2016 by mm

co-ordinate geometry maths
find area of triangle abc & triangle def if D E F are mid points of AB BC &CA D(2,1) E(1,0) F(_1,3)
February 25, 2016 by anila

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
find the length of ab & bc of a triangle abc having given the length of ac = 28inch, angle abc = 90, angle bac =30,, angle acb = 60
January 4, 2012 by Anonymous

Trig
a. What is the length of the hypotenuse of triangle ABC? b. What is the length of the shorter leg of triangle ABC? c. What is the length of the longer leg of triangle ABC? angle A=60, angle B=30, angle C=90 the triangle has a height of 10
February 3, 2012 by BreAnne

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 triangle ABC, AB=5 cm, BC=12 cm and angle ABC=90 degree, calculate the length of AC.
September 28, 2014 by Bhuvanesh. D

geometry
In triangle ABC, ab=5 cm, BC=12 cm and ABC=90 degree, calculate the length of AC.
September 28, 2014 by Bhuvanesh. D

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

Science
2-abc 3-def 4-ghi 5-jkl 6-mno 7-prs 8-tuv 9-wxy 639-8667(Apple dodger) 622-4463(let it do the work) 385-2786(an important point)
November 9, 2015 by Anonymous

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

Math (Geometry)
In right triangle ABC, we are given that ∠ABC=90∘ and AC=34. D is a point on line segment BC such that BD=12,DC=18. What is the length of AD?
April 29, 2013 by Bob

Math
1. If triangle ABC is congruent to DEF, m angle A =55, and m angle E =25. What is m angle C? A) 25 B) 55 C) 80 D) 100 Is the answer C?
February 9, 2016 by Tim

pre-algebra
Assume that triangle ABC is congruent to triangle XYZ. If AB=12cm and BC=15cm, what is the length of segment YZ?
March 30, 2010 by alondra

Geometry
The coordinates of the vertices of ABC are A(-2,2) B (5, -3) and C (-4,-1) Identify the perimeter of ABC. Round each length to the nearest tenth before adding. I am totally lost!
September 14, 2015 by Roberty

Math
In rhombus DEFG, if m<DEF=60, and the shorter diagonal DF has a length of 7, find the length of the side of a rhombus.
March 5, 2010 by Chris

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

Geometry
In right triangle ABC, the median to the hypotenuse has length 15 units and the altitude to the hypotenuse has length 12 units. What is the legth of the shorter leg of triangle ABC?
January 6, 2011 by Jake

geometry
In ΔABC, AB is of the length of , and AC is of the length of . The perimeter of ΔABC is 24. (a) AB = ___units. (b) AC = ___units. (c) BC =___ units
March 11, 2010 by nini

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

Math
Please help me with this home work Triangle ABC ~ Triangle ADE AD=5; DB=3.5; BC=5.1; AE=6; EC=x What is the length of AB? What is the length of DE? Write an expression that represents AC? What is the length of EC? What is the length of AC? Thank you
November 11, 2015 by Kenny

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 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

geometry
Jim has put a fence along the side AC of the triangular patch of land shown below. A right angle triangle ABC is shown having length of one leg equal to 6 meters. The measure of angle ABC is 90 degrees. A fence is shown on the hypotenuse of the triangle. The length of the ...
January 6, 2012 by sunny

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

Math
ABC is an equilateral triangle with side length 4. M is the midpoint of BC, and AM is a diagonal of square ALMN. Find the area of the region common to both ABC and ALMN.
July 17, 2016 by Bob

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

Math
Triangle ABC ~ Triangle ADE AD=5; DB=3.5; BC=5.1; AE=6; EC=x What is the length of AB? What is the length of DE? Write an expression that represents AC? What is the length of EC? What is the length of AC?
November 11, 2015 by Kenny

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

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

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

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

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

MATHS HELP URGENT.pleasee
The area of a triangle ABC is 126 sq.cm. AC=13 cm , BC = 21 cm, what is the length of AB? where, triangle ABC is a scalene triangle
January 6, 2016 by JILL

Maths
The triangle is called ABC. Angle B has an angle of 90 degrees. The length of AB is 15mm and the length of BC is 16mm. Find the length of AC
February 17, 2016 by Melissa

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

Maths
triangle ABC is right angled at A. AD is perpendicularto BC. If AB= 5cm,BC= 13cm and AC=12 cm.find the area of triangle ABC. Also find the length of AD.
December 6, 2011 by leon

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

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