1. Find the area, in square feet, of a circle with a 30 inch diameter.

2. Find the area, in square feet, of a circle with a diameter of 30 feet.

3. Find the area, in square feet, of a circle with a diameter of 36 inches.

4. Find the area, in square feet, of a rectangle with dimensions of 35 feet and 15 feet wide.

5. Find the area, in square feet, of a rectangle with dimensions of 100 inches long and 8 inches wide.

Answers:

1. 4.91 sqft

(30 in) / (12 in/ft) = 2.5 ft 0.785 X 2.5 ft X 2.5 ft =

OR (2.5 ft) / (2) = 1.25 ft 3.14 X 1.25 ft X 1.25 ft =

2. 706.5 sqft

0.785 X 30 ft X 30 ft =

OR (30 ft) / (2) = 15 ft 3.14 X 15 ft X 15 ft =

3. 7.065 square feet

(36 inches) / (12 inches/foot) = 3 feet 0.785 X 3 ft X 3 ft =

OR (3 ft) / (2) = 1.5 ft 3.14 X 1.5 ft X 1.5 ft =

4. 525 square feet

35 feet X 15 feet =

5. 5.55 sqft

(100 inches) / (12 inches/foot) = 8.33 ft (8 in) / (12 in/ft) = 0.667 ft

8.33 ft X 0.667 ft =