Find the perimeter and area of a semi circle whose radius is 5.6 cm.
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Answer:
perimeter=22/7*5.6
=22*8/10
=17.6cm
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Radius of circle = 5.6 cm
Circumference of semicircle = 2πr½ + 11.2
= 2 × 3.14 × 5.6 × ½ + 11.2
= 3.14 × 5.6 + 11.2
= 175.84 + 11.2
= 187.04 cm.
Area of semicircle = πr²½
= 3.14 × 5.6² × ½
= 3.14 × 31.36 × ½
= 1.57 × 31.36
= 49.23 cm².
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