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If the diameter of a circle is 20 cm, what is its circumference? (2022)
If the diameter of a circle is 20 cm, what is its circumference? (2022)
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Practice Questions
1 question
Q1
If the diameter of a circle is 20 cm, what is its circumference? (2022)
62.83 cm
31.42 cm
20 cm
40 cm
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Circumference = πd; C = π * 20 ≈ 62.83 cm.
Questions & Step-by-step Solutions
1 item
Q
Q: If the diameter of a circle is 20 cm, what is its circumference? (2022)
Solution:
Circumference = πd; C = π * 20 ≈ 62.83 cm.
Steps: 7
Show Steps
Step 1: Understand that the diameter of the circle is given as 20 cm.
Step 2: Recall the formula for the circumference of a circle, which is Circumference = π * diameter.
Step 3: Substitute the diameter into the formula: Circumference = π * 20 cm.
Step 4: Use the approximate value of π, which is about 3.14.
Step 5: Calculate the circumference: Circumference ≈ 3.14 * 20 cm.
Step 6: Perform the multiplication: 3.14 * 20 = 62.8 cm.
Step 7: Round the answer to two decimal places if needed: Circumference ≈ 62.83 cm.
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