I have included a picture. In the picture you will find the work and final answer.
Answer:
a square has 4 sides each of those sides is 19in long perimeter is all around the square so you would add 19+19+19+19=79in
A rectangle that is 10 wide and 10 high and 8 units long would have 800 cubic units
Angle B is 45, angle A is 108, angle C is 27