Question

The circumference of a circle is 9π m. What is the area, in square meters? Express your answer in terms of π π

Answer 1

A≈6.45

Step-by-step explanation: C 9

Using the formulas

A=πr2

C=2πr

Solving for A

A=C2

4π=92

4·π≈6.44578

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Answer 2

A = 20.25π sq meters

Explanation:

C = 2πr

9π = 2πr

divide π from each side to get:

9 = 2r

r = 9/2 or 4 1/2

A = πr²

A = π (4.5²)

A = 20.25π