Measure of an arc of a circle is 80˚ and its radius is 18 cm. Find the length of the arc. ( = 3.14)


Given measure of arc, = 80˚
Radius , r = 18cm
= 3.14
Length of arc , l = (/360)2r
= (80/360)×2×3.14×18
= 25.12cm
Hence the length of the arc is 25.12cm.

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