Math, asked by rookief4086, 10 months ago

The perimeter of a semicircular protractor is 72 cm. Its diameter is

Answers

Answered by devansh21865

0

Answer:

28 cm

Step-by-step explanation:

Perimeter of Semicircle = r (π+2)

=> 72 = r (22/7 + 2)

or, 72 = r [(22+14)/7]

=> 72 = r x 36/7

Therefore, r = 72 x 7 / 36 = 2 x 7 = 14 cm,

This gives Diameter = 14 x 2 = 28 cm

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