A rectangle that measure 4 by 6 has vertices A,B,C and D. The Midpoint (E) of CD is labeled, and ADE is drawn to form a 3-4-5 triangle. Then, it is reflected over the hypotenuse to get triangle AD'E. How far away is D' from C?
Your diagram is not drawn correctly!!!
CE = ED' = 3
Find angle CED'
Use the law of cosines to find the length of CD'
Warning: if you do not even attempt to solve this, I'll delete my post.
I know the answer, but I won't tell you.
if you do not even attempt to solve this, I'll delete my post. 
