Area of a Circle with Radius 4 (Answer: 50.2655)

Exact Answer

A = π × 4² = 50.2655

Area (πr²)

50.2655 (16π)

Circumference (2πr)

25.1327 (8π)

Diameter (2r)

Radius (r)

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Step-by-Step Solution: A = π × 4² = 50.2655

Step 1

Calculate the Area Using A = πr²

Square the radius (4² = 16) and multiply by π (≈ 3.14159265): 16 × π = 50.2655.

A = π × 4² = 16π ≈ 50.2655

Step 2

Calculate the Circumference Using C = 2πr

Multiply 2 × π × 4 = 8π ≈ 25.1327.

C = 2 × π × 4 ≈ 25.1327

Summary & Alternative Representations

Property / Format	Value
Area (πr²)	`50.2655 (16π)`
Circumference (2πr)	`25.1327 (8π)`
Diameter (2r)	`8`
Radius (r)	`4`

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Frequently Asked Questions

What is the circumference of a circle with radius 4?

The circumference is 2 × π × 4 ≈ 25.1327.