Find the volume of the rectangular prism. all of them. asap

Pls , the question is in the picture!

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

The diagonals of a quadrilaretral intersect at (-1,4). one of the sides of the quadrilateral is bounded by (2,7) and (-3,5) determine the coordinates of the other side in order for the quadrilaretral to be a square.