Question

if the perimeter of a semi-circular protactor is 72cm.then find its radius​

Answer 1

Answer:

14 cm is the answer

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Answer 2

We Know that Perimeter of Semi circle = πr + 2r

So , πr + 2r = 72

r(π+2) = 72

r(22/7+2) = 72

r(38/7) = 72

r = 72 x 7 / 38

r = 13.26 approx.

r = 14 cm

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