Question
Download Solution PDFThe perimeter of a semicircle of radius 21 cm is ______
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
Radius of the semicircle = 21 cm
Concept used:
1. The perimeter of a semicircle = πR + 2R (R = radius)
2. π = 22/7
Calculation:
Now, the perimeter of a semicircle
⇒ π × 21 + 2 × 21
⇒ 22/7 × 21 + 2 × 21
⇒ 108 cm
∴ The perimeter of a semicircle of radius 21 cm is 108 cm.
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