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Find the circumferences of the circles with the radius given below. A) 7 cm B) 3.5 cm C) 14 cm |
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Answer» A) Given radius (r) = 7 cm Circumference of a circle C = 2πr (∵ π = \(\frac{22}{7}\)) = 2 x \(\frac{22}{7}\) x 7 = 44 cm ∴ Circumference of a circle = 44 cm B) Given radius (r) = 3.5 cm Circumference of a circle C = 2πr (∵ π = \(\frac{22}{7}\)) = 2 x \(\frac{22}{7}\) x 3.5 ∴ Circumference of a circle = 22 cm C) Given radius (r) = 14 cm Circumference of a circle C = 2πr (∵ π = \(\frac{22}{7}\)) = 2 x \(\frac{22}{7}\) x 14 ∴ Circumference of a circle = 88 cm |
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