Prove that if the diagonals of a trapezoid are congruent,

Sattelhofsk

Sattelhofsk

Answered question

2022-06-14

Prove that if the diagonals of a trapezoid are congruent, then the trapezoid is isosceles, using coordinate geometry.

Answer & Explanation

britspears523jp

britspears523jp

Beginner2022-06-15Added 28 answers

Step 1
Let the vertices, in counterclockwise order, be P,Q,R,S, with PQ parallel to RS.
Let P = ( 0 , 0 ) , Q = ( a , 0 ) , R = ( b , h ) , and S = ( c , h ) .
Because the diagonals are equal, you know that b 2 + h 2 = ( c a ) 2 + h 2 .
You want to show that the two non-parallel sides are equal, so you want to show that c 2 + h 2 = ( b a ) 2 + h 2 .

Do you have a similar question?

Recalculate according to your conditions!

New Questions in Elementary geometry

Ask your question.
Get an expert answer.

Let our experts help you. Answer in as fast as 15 minutes.

Didn't find what you were looking for?