How to find area of a sector in a circle

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Area of a sector of a circle

In a circle with radius r and center at O, let ∠POQ = θ (in degrees) be the angle of the sector. Then, the area of the circle is calculated using the unitary method.

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Area of a Sector of a Circle

From the proportion we can easily find the final sector area formula: Sector Area = α × πr² / 2π = α × r² / 2 The same method may be used to find arc length - all you need to