Find radius if the length of an arc
of the circle is ∏/15 cm.
Solution
L= ∏/5 , r = ?
L = ∏r
180
∏/5 = ∏r
180
180 x ∏/5 = ∏r
x 180
180 ∏ = ∏r
5
180 ∏ = ∏r
15∏ ∏
180 = r
15
r = 36cm
Hence radius is 36 cm
TRY THIS………………..
Find radius if the length of an arc
of the circle is ∏/20 cm.
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