Question

The area of a circle is 9πft^2. What is the circumference in feet?

Answer 1

98

Explanation:

Answer 2

• 6π ft

Explanation:

Area:

• A = πr²

Circumference:

• C = 2πr

Substitute values in area:

• πr² = 9π
• r² = 9
• r = 3 ft

Circumference is:

• C = 2π*3 = 6π