How to find the length of a diagonal of a rectangle?

Question

mathmale · Answer

I'd suggest that you actually draw a rectangle and inside it draw a diagonal.  What shape is formed by the diagonal and the two legs (made up by the length and width of the rectangle)?|dw:1450149775449:dw|

anonymous · Answer

It forms two right triangles

anonymous · Answer

So how would I go about finding the length without an equation?

ram231 · Answer

you use the pythagorean theorem.... $$a ^{2}+b ^{2}= c ^{2}$$

mathmale · Answer

|dw:1450151172223:dw|

mathmale · Answer

since no numeric values are given for the lengths, just solve the Pythagorean Theorem equation given you by RAM231 for D, the length of the diagonal.

anonymous · Answer

Ok thanks!

mathmale · Answer

You're welcome.

ram231 · Answer

Your welcome for giving the equation :D I feel special now (: