MATH 1022 Chapter : Revised Section 6 2 Trigsted
Document Summary
Determining the area of a sector of a circle. Definition: a sector of a circle is a portion of a circle bounded by two radii and an arc of the circle. In a circle of radius r, the area a of a sector with central angle of radians is r. Example 1: find the area of the sector of a circle with central angle of. 7 radians and radius 4 cm. a) express answer in terms of . b) round answer to 2 decimal places. Computing the arc length of a sector of a circle. In a circle of radius r, the length s of an arc that subtends a central angle of radians is s. Example 2: find the distance along 1 of arc at the equator on the earth"s surface, assuming the radius of the earth to be 3963 miles.
