What is the perimeter of a circle with a radius of 10 cm?

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Question: What is the perimeter of a circle with a radius of 10 cm?

Options:

Correct Answer: 62.8 cm

Solution:

Perimeter (Circumference) = 2πr = 2π(10) = 20π ≈ 62.8 cm.

What is the perimeter of a circle with a radius of 10 cm?

What is the perimeter of a circle with a radius of 10 cm?

Step 1: Understand that the perimeter of a circle is called the circumference.
Step 2: Know the formula for the circumference of a circle: Circumference = 2πr, where r is the radius.
Step 3: Identify the radius given in the question, which is 10 cm.
Step 4: Substitute the radius into the formula: Circumference = 2π(10).
Step 5: Calculate 2 times 10, which equals 20. So, Circumference = 20π.
Step 6: If needed, use the approximate value of π (about 3.14) to find a numerical answer: 20π ≈ 20 * 3.14 = 62.8 cm.

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