the perimeter of halfcircle whose diameter is 21
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1
Diameter=21cm
Circumference of semi circle=
π*d*1/2
22/7*21*1/2=33cm+diameter=33+21cm=54 cm
Therefore the circumference of the semi circle is 54 cm
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Answered by
0
Answer:
Step-by-step explanation:
C = 2 * π * r
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