5. Find the perimeter and area of each of the following shapes : circle 14 cm
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>>Find the perimeter and area of a semicir
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Find the perimeter and area of a semicircle whose radius is 14 cm.
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Radius of a semicircle, r=14cm
Perimeter of a semicircle, P=(π+2)r units
∴P=(
7
22
+2)×14
=(
7
22+14
)×14=
7
36
×14=72
Perimeter of the semicircle = 72 cm.
Area of a semicircle, A= 2πr 2 sq. units
∴A= 722 × 2
14×14
=308cm 2 .
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