Asked by | 12th Mar, 2009, 12:15: PM
TETA / 360 * 2 pi r is used to find the length of an arc of a sector of angle θ.
ETA / 360 * 2 pi r + 2r is used to find the perimeter of a sector of angle θ.
Answered by | 12th Mar, 2009, 12:22: PM
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