Sector Area Calculator
From Radius & Angle (Degrees)
From Radius & Angle (Radians)
From Radius & Arc Length
Formula
A = (1/2)*r^2*theta | Arc = r*theta | Perimeter = arc + 2r
Frequently Asked Questions
How do you calculate the area of a sector?
Sector area = (1/2)*r^2*theta, where theta is in radians. Or equivalently, area = (theta/360)*pi*r^2 when using degrees.
What is the perimeter of a sector?
The perimeter of a sector = arc length + 2 * radius. It includes the curved part and the two straight radii.
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