The perpendicular drawn from the center of the circle to the chord bisects the chord and forms a with the radii.
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The area of a sector of a circle with radius $r$ and central angle $\theta$ is $\frac{\theta}{360^\circ} \times \pi \times r^2$, for angle $\theta$ measured in .
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The circular segment area formula involves multiplying the central angle over $360^\circ$ by $\pi \times r^2$. The central angle is denoted by the Greek letter
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If a circle has an area of $\pi \times 16$, the radius of the circle is .
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To calculate the area of a circular segment, first calculate the area of the corresponding sector, then subtract the area of the associated triangle.