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Perimeter and Area of a Circle - A Review

(i) Area of a Circle
Area of a Circle = π r2 sq unitswhere r is the radius of the circle and π (called pie) is a constant and the value of π = 3.14.

(ii) Circumference
Circumference of the Circle = 2πr units, where r = radius of the circle,
Circumference of the Circle = πd units, if d (diameter of a circle) = 2r units


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