Circle formula for Area, Circumference and Area of ring. – InterviewSolution

1.

Circle formula for Area, Circumference and Area of ring.

Answer»

Area = π × radius²

Circumference = 2πr or πd

(where radius = r and diameter = d)

Area of ring = \(π(r^2_2 - r^2_1)\), where r₂ and r₁ are the outer and inner radius respectively.

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