+0  
 
+1
48
4
avatar+79 

What is the formula?

 

Also, can you prove it?

 Jan 15, 2019
 #1
avatar+429 
0

well i saw this written by another guy, its sum of two bases over 2..

maybe use similar triangles to prove? IDK!

 Jan 15, 2019
 #2
avatar+52 
+1

Before reading this answer, you might want to take a look at 

https://web2.0calc.com/questions/geometry-trapezoid

 

An orthodiagonal right trapezoid essentially means a trapezoid in where the diagonals intersect at a right angle.

 

Will do an answer when I can get a camera to work.

 Jan 15, 2019
 #3
avatar+79 
0

Thank you

 

Pls asap though

itsyaboi  Jan 15, 2019
 #4
avatar+52 
+1

I was unable to get a camera to work, so You'll have to read carfully.

 

1.Construct a trapezoid with the description of the problem.

2.Name the verticies starting from the top left side, going clockwise, A,B,C and D respectively.

3.Draw altitudes going down from A and B. Name the points where they intersect DC F and E, F is on the left.

4.Let side \(\overline{AB}\) be a, and \(\overline{DC}\) be b. \(\overline{FE}\) is a, and \(\overline{EC}\) = \(\overline{DF}\) = \(\frac{b-a}{2}\).

5.Let the intersection of diagonals be O.

6.\(\triangle DOC\) is a 45-45-90 triangle.

 

See if you can work it out from there.

 Jan 15, 2019

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