1.

Find the perimeter of a semicircular protractor whose diameter is 14 cm.

Answer»

Diameter of the semicircular protractor = 14 cm

Radius = 14/2 cm = 7 cm

Perimeter of semicircle = πr + d

Perimeter of semicircular protractor = 22/7 x 7 + 14 

= 22 + 14 = 36 cm

The perimeter of the semicircular protractor is 36 cm.



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