So Pythagorean theorem is ab= 13.

Because cd is the center line on the hypotenuse ab.

So bd=ad=6.5, triangle acd= 1/2abc.

So1/2× ad× ce =1/2×1/2× 5×1.

That is, ad=60/ 13.

In the triangle ace, ac=5, ce=60/ 13.

So ae=25/ 13.

So de= 1 19/29.

Therefore, the ratio of ad to ed is bd=50 1 19 169.

(2) Because de= 1 19/29 and ce=60/ 13, S △ CDE =119/23 * 60/13 *.

I made this myself, by the way, hee hee.