Question 4, page 3:
Formulas: Area(square) = side2 Area(circle) = pi · radius2
[On circles, remember to use the radius, not the diameter.]
a) Answer = Area(square) - Area(circle) = (8)2 - pi·(4)2
b) Answer = Area(outside circle) - Area(inside circle) = pi·(11)2 - pi·(9)2
c) Answer = Area(outside circle) - Area(inside circle) = pi·(4)2 - pi(2.5)2