Find the area and quick i will mark brainelist :) :3

Can someone me with these two circle theorem questions asap?

Three numbers x, y, and z are in the ratio 2: 7: 8. if 12 is subtracted from y, then three numbers form a geometric sequence (in the order x, y–12, z). find x, y, and z. there are 2 sets.

Plz ( true - false) all triangles have interior angles whose measure sum to 90.