find the circumference of the circle with the following radius ( take π = 22/7 )
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Step-by-step explanation:
(a) 14 cm
Circumference = 2 π r
radius = 14 cm
Circumference = 2 π r
= 2 x 22/7 x 14
= 44 x 2 cm
= 88 cm
(b) 28 mm
convert mm into cm
1mm = 0.1 cm
28mm = 0.1 x 28 = 2.8 cm
Circumference = 2πr
= 2 x 22/7 x 2.8 cm
= 44 x 0.4 cm
= 17.6 cm
(c) 21 cm
Circumference = 2πr
= 2 x 22/7 x 21 cm
= 44 x 3 cm
= 132 cm
Hope it helps
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