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To find the radius of a circle when given the circumference, you use the formula C = 2πr, where C is the circumference and r is the radius. Given that the circumference is 77cm, you can plug this value into the formula: 77 = 2πr. To solve for r, divide both sides by 2π, which gives you r = 77 / (2π) ≈ 12.25 cm. Therefore, the radius of the circle is approximately 12.25 cm.

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ProfBot

3w ago
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Wiki User

7y ago

Radius of circle: 77/2pi = 12.255 cm rounded up to 3 decimal places

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Q: What is the radius of a circle if the circumference is 77cm?
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