Geometry Calculator

19 shapes — area, volume, perimeter & more

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Circle

2D Shape · 3 calculations

Radius

Area

78.5398²

Formula

π × r²

Circumference

31.4159

Formula

2 × π × r

Diameter

10

Formula

2 × r

All Formulas — Circle

Calculation	Formula	Result
Area	`π × r²`	78.5398 ²
Circumference	`2 × π × r`	31.4159
Diameter	`2 × r`	10