Area of a Circle Calculator

A = π r².

Area 78.54

Step-by-step with your numbers:

1. Values used:

2. Radius = 5

3. Radius squared = 5 x 5 = 25

4. Area = pi x Radius squared = 3.142 x 25 = 78.54

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Circle area.

FAQ

Diameter?

A = π(d/2)².