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Question
If the perimeter of semi circular protractor is 108cm find the diameter of the protractor
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Solution
Perimeter=108cm
Pi x r +2r=108
r(22/7+2)=108
r(22+14/7)=108
r(36/7)=108
r=108x7/36
r=3x7
r=21cm
Therefore, d=2r
=2x21=42cm
Perimeter=108cm
Pi x r +2r=108
r(22/7+2)=108
r(22+14/7)=108
r(36/7)=108
r=108x7/36
r=3x7
r=21cm
Therefore, d=2r
=2x21=42cm
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