Circles Formula
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Important Formulas 1. Circumference of a circle = 2π r 2. Area of circular ring = π ( R 2 − r 2 )
3. Area of a sector of a circle =
ao ×π r2 360o
4. Length of an arc of a circle =
ao × 2π r 360o
5. Area of segment of a circle = Area of the sector – area of the corresponding triangle. 6. Area of the major segment = Area of the circle – area of minor segment.
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3. Area of a sector of a circle =
ao ×π r2 360o
4. Length of an arc of a circle =
ao × 2π r 360o
5. Area of segment of a circle = Area of the sector – area of the corresponding triangle. 6. Area of the major segment = Area of the circle – area of minor segment.
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