Question

Find the circumference and area of each circle to the nearest tenth. Use 3.14 for pi. 1.) radius = 1.7 2.) radius = 14 ft 3.) 9 in

Answer 1

Explanation:

Circumference of a circle = 2πr

Area of circle = πr²

Here, r = radius of the circle

1). For radius = 1.7 units

Circumference = 2π(1.7)

= 2(3.14)(1.7)

= 10.676

≈ 10.7 units

Area of the circle = π(1.7)²

= 3.14(1.7)²

= 9.0746

= 9.1 units²

2). For radius = 14 ft

Circumference of the circle = 2π(14)

= 28(3.14)

= 87.92

≈ 87.9 ft

Area of the circle = πr²

= 3.14(14)²

= 615.44

≈ 615.4 ft²

3). For radius = 9 in.

Circumference = 2π(9)

= 18π

= 56.52

≈ 56.5 in

Area of the circle = π(9)²

= 81π

= 254.34 in²

≈ 254.3 in²