What is the circumference of a circle with a radius of 4 cm?

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Question: What is the circumference of a circle with a radius of 4 cm?

Options:

Correct Answer: 12.56 cm

Solution:

Circumference = 2πr = 2π(4) = 8π ≈ 25.12 cm.

What is the circumference of a circle with a radius of 4 cm?

What is the circumference of a circle with a radius of 4 cm?

Step 1: Understand that the circumference of a circle is the distance around it.
Step 2: Know the formula for circumference, which is Circumference = 2πr, where r is the radius.
Step 3: Identify the radius given in the question, which is 4 cm.
Step 4: Substitute the radius into the formula: Circumference = 2π(4).
Step 5: Calculate 2 times 4, which equals 8.
Step 6: Now, write the circumference as 8π.
Step 7: If you want a decimal approximation, multiply 8 by the value of π (approximately 3.14).
Step 8: Calculate 8 × 3.14, which is approximately 25.12 cm.

Circumference of a Circle – The circumference is the distance around a circle, calculated using the formula C = 2πr, where r is the radius.