Circle with Area 129.15 Square Inches

Instant diameter calculation and visualization

Diameter

12.8234 inches

Radius

6.4117 inches

Circumference

40.2858 inches

Area

129.15 in²

How to Calculate Circle Diameter from Area

Step-by-Step Solution

  1. Start with the circle area formula: A = πr²
  2. Solve for radius: r = √(A/π)
  3. Calculate diameter: d = 2r
r = √(129.15/π) = 6.4117 inches
d = 2 × 6.4117 = 12.8234 inches

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