SOLUTIONS TO PROBLEMS

(1) a. A = π r2

b. A = π r2

= 3.14 (5 inches)2

= 3.14 x (7 feet)2

= 3.14 x 25 square inches

= 3.14 x 49 square feet

A = 78.5 square inches

A = 153.86 square feet

c. A = π r2

d. A = π r2

= 3.14 (6 yards)2

= 3.14 (4.5 inches)2

= 3.14 x 36 square yards

= 3.14 x 20.25 square inches

A = 113.04 square yards

A = 63.58 square inches

(2) A = π r2

= 3.14 (3 inches)2

= 3.14 x 9 square inches

A = 28.26 square inches

(3) A = π r2

D = 2 feet

= 3.14 (1 foot)2

r = 1 foot

= 3.14 x 1 square foot

A = 3.14 square feet

(4) (Circle)

A = π r2

D = 3 inches

(Area of tin square)

= 3.14 x 1.5 inches

r = 1.5 inches

A = L x W

= 3.14 x 2.25 sq inches

= 3 inches x 3 inches

A = 7.06 square inches

= 9 square inches

Area of Square = 9.00 square inches

Area of Circle = 7.06 square inches

Amount Wasted = 1.94 square inches

If you had difficulty with these problems, you should go to page 28.

If you were able to solve these problems without any mistakes, turn to page 31.

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