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 =