Hi, I cannot figure out this question, can anyone help?

The legs of a right triangle measure 6 meters and 8 meters. what is the length of the hypotonuse.

Can anyone me with this question?

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