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Area of a Segment and a Sector A segment is a part of a circle bounded by a chord and its arc, as shown in figure 1-13. The formula for its area is
where r = the radius and n = the central angle in degrees.
Figure 1-13.-Segment and sector of a circle, A sector is a part of a circle bounded by two radii and their intercepted arc. The formula for its area is
where r and n have the same designation as above. |
 
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