Circle with Area 390.1494 Square Inches

Instant diameter calculation and visualization

Diameter

22.288 inches

Radius

11.144 inches

Circumference

70.0197 inches

Area

390.1494 in²

How to Calculate Circle Diameter from Area

Step-by-Step Solution

Start with the circle area formula: A = πr²
Solve for radius: r = √(A/π)
Calculate diameter: d = 2r


                            r = √(390.1494/π) = 11.144 inches

                            d = 2 × 11.144 = 22.288 inches

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