If the diameter of a circle is 20 cm, what is its circumference? (2022)

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Question: If the diameter of a circle is 20 cm, what is its circumference? (2022)

Options:

Correct Answer: 62.83 cm

Solution:

Circumference = πd; C = π * 20 ≈ 62.83 cm.

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)

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.

Circumference of a Circle – The circumference of a circle is calculated using the formula C = πd, where d is the diameter.