Question

If the perimeter of a semicircular protractor is 36cm , then it's diameter is :
(a) 10cm
(b) 12cm
(c) 14cm
(d) 15cm​

Answer 1

C) 14cm

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Answer 2

PERIMETER OS SEMICIRCLE IS:

πR+2R

THEREFORE R(π+2)= 36

R = 36/π+2

R= 7 cm

DIAMETER= 2(R) = 14 cm

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