You have to solve for x the picture is in the description. Thanks

Question

Answer 1

Use the Theorem of Pythagoras.

You should get a quadratic equation which you can solve for x (there may be 2 acceptable solutions or one may be extraneous).

Then go back and substitute for x to get the sides.

P.S.

Your English grammar needs some attention, too. You forgot a period and a capital letter!