Pls someone help me :))

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)

Aconstruction worker needs to put a rectangular window in the side of a building he knows from measuring that the top and bottom of the window have a width of 8bfeet and the sides have a length of 15 feet he also measured one diagonal to be 17 feet what is the length of the other diagonal