Find the perimeter of semicircle whose diameter is 77cm
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The perimeter of semicircle whose diameter is 77 cm is 197.89 cm.
To calculate the perimeter of semicircle the following formula is used:
Perimeter = πr + 2r OR πr +d
where;
r = radius of semicircle
d = diameter of semicircle
Given : Diameter of the semicircle = 77 cm
π = 3.14
∴ Radius = diameter ÷ 2
= 77 ÷ 2
= 38.5 cm
∴ Perimeter = πr + 2r
= 3.14 (38.5) + 2(38.5)
= 120.89 + 77
= 197.89
Therefore, the perimeter of the semicircle is 197.89 cm.
(Here in the question the unit of diameter was in cm, hence the unit in the answer is also kept in cm)
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