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Formula for calculating the area of a circle and sector based on radius and angle in degrees or radians.

A diagram illustrating the area of a circle and sector, showing formulas for calculating the area of a circle (πr²) and a sector (θ/360° × πr² for degrees, or 1/2 r²θ for radians), with visual representations of a circle and a sector with radius r and angle θ.

A diagram illustrating the area of a circle and sector, showing formulas for calculating the area of a circle (πr²) and a sector (θ/360° × πr² for degrees, or 1/2 r²θ for radians), with visual representations of a circle and a sector with radius r and angle θ.

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