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If a circle has a circumference of 62.8 cm, what is its radius? (2018)
If a circle has a circumference of 62.8 cm, what is its radius? (2018)
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If a circle has a circumference of 62.8 cm, what is its radius? (2018)
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5 cm
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Circumference = 2πr; 62.8 = 2 * π * r; r = 62.8 / (2 * π) = 10 cm.
Questions & Step-by-step Solutions
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Q
Q: If a circle has a circumference of 62.8 cm, what is its radius? (2018)
Solution:
Circumference = 2πr; 62.8 = 2 * π * r; r = 62.8 / (2 * π) = 10 cm.
Steps: 6
Show Steps
Step 1: Understand that the circumference of a circle is given by the formula: Circumference = 2πr, where r is the radius.
Step 2: We know the circumference is 62.8 cm, so we can write the equation: 62.8 = 2πr.
Step 3: To find the radius (r), we need to isolate r in the equation. First, divide both sides by 2π: r = 62.8 / (2π).
Step 4: Calculate the value of 2π. Use the approximation π ≈ 3.14, so 2π ≈ 6.28.
Step 5: Now substitute 6.28 into the equation: r = 62.8 / 6.28.
Step 6: Perform the division: r = 10 cm.
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