In parallelogram QRST shown below, diagonal is drawn, U and V are points on and , respectively, and intersects at W. If , , and , what is ? 1) 37º 2) 60º 3) 72º 4) 83º

the answer would be the third option, "no, ariel should have added 9^2 and 12^2 and compared that to 15^2."

this is found through the pythagorean theorem, which is a^2 + b^2 = c^2.

this is the correct way of solving the problem:

9^2 + 12^2 = 15^2

81 + 144 = 225

225 = 225