Question

find the area and circumference of each circle. Use pi in your answer (example: radius = 8, or diameter = 14).

Answer 1

Area: 201.06
Circumference: 50.26
Area: 153.93
Circumference: 43.98

Answer 2

Solutions below.

Explanation:

First, we have to define each of the formulas first.

Area of Circle =

`\pi {r}^(2)`

Circumference of Circle =

`2\pi \: r`

With the above formula above, we can find the Area and Circumference for each circle.

Circle A:

Radius = 8

Area =

`\pi {(8)}^(2) = 64\pi {units}^(2)`

Circumference =

`2\pi(8) = 16\pi \: units`

Circle B:

Diameter = 14 units

Radius = 14 ÷ 2 = 7 units

Area =

`\pi {(7)}^(2) = 49\pi {units}^(2)`

Circumference =

`2\pi(7) = 14\pi \: units`