Area of a Circle with Radius 5 (Answer: 78.5398)

Exact Answer

A = π × 5² = 78.5398

Area (πr²)

78.5398 (25π)

Circumference (2πr)

31.4159 (10π)

Diameter (2r)

Radius (r)

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Step-by-Step Solution: A = π × 5² = 78.5398

Step 1

Calculate the Area Using A = πr²

Square the radius (5² = 25) and multiply by π (≈ 3.14159265): 25 × π = 78.5398.

A = π × 5² = 25π ≈ 78.5398

Step 2

Calculate the Circumference Using C = 2πr

Multiply 2 × π × 5 = 10π ≈ 31.4159.

C = 2 × π × 5 ≈ 31.4159

Summary & Alternative Representations

Property / Format	Value
Area (πr²)	`78.5398 (25π)`
Circumference (2πr)	`31.4159 (10π)`
Diameter (2r)	`10`
Radius (r)	`5`

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Frequently Asked Questions

What is the circumference of a circle with radius 5?

The circumference is 2 × π × 5 ≈ 31.4159.