Find area of semicircle whose diameter is 21cm
Answers
Answered by
1
Radius = d/2 = 21/2 = 10.5cm
Area of semi circle = πr^2
= 1/2*22/7*(10.5)^2
= 11/7*110.25
= 11*15.75
=173.25cm^2
Answered by
1
Answer:
173.25 cm^2
Step-by-step explanation:
diameter is 21cm
Radius = D/2 = 21/2
area of semicircle = 1/2 ×22/7 ×r^2
= 1/2 × 22/7 × 21/2cm × 21/2cm
= 173.25cm^2
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