Area of a Circle with Radius 3 (Answer: 28.2743)

Exact Answer

A = π × 3² = 28.2743

Area (πr²)

28.2743 (9π)

Circumference (2πr)

18.8496 (6π)

Diameter (2r)

Radius (r)

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Step-by-Step Solution: A = π × 3² = 28.2743

Step 1

Calculate the Area Using A = πr²

Square the radius (3² = 9) and multiply by π (≈ 3.14159265): 9 × π = 28.2743.

A = π × 3² = 9π ≈ 28.2743

Step 2

Calculate the Circumference Using C = 2πr

Multiply 2 × π × 3 = 6π ≈ 18.8496.

C = 2 × π × 3 ≈ 18.8496

Summary & Alternative Representations

Property / Format	Value
Area (πr²)	`28.2743 (9π)`
Circumference (2πr)	`18.8496 (6π)`
Diameter (2r)	`6`
Radius (r)	`3`

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Frequently Asked Questions

What is the circumference of a circle with radius 3?

The circumference is 2 × π × 3 ≈ 18.8496.