Question

if the perimeter of semicircle protractor is 108 cm then find the diameter of the prtractor​

Answer 1

Answer:

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Answer 2

The perimeter of the semicircular protractor is half the perimeter of circular protractor i.e pi R plus the diameter i.e 2R.

So we know,

Perimeter = 108 cm

Pi R + 2R = 108

R( Pi +2)= 108

R( 22÷7 + 2) = 108

R× 36÷7 = 108

R= (108×7)÷7

R =21