a line that divides an angle into two equal angles
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In a unit circle, the arc length ( s ) is directly equal to the angle ( \theta ) in radians. Therefore, if the arc length of a sector is 3 radians, the measure of the angle of the sector is also 3 radians.
Multiply ( pi R2 ) by [ (angle included in the sector) / 360 ].
the area of a sector = (angle)/360 x PI x radius x radius pi r squared
There is no specific formula for a sector of a circle. There is a formula for its angle (at the centre), its perimeter, its area.
The angle of the sector measures 39.6 degrees (.11*360).