If a circle has a radius of 7 cm, what is its circumference? (Use π ≈ 3.14)

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Question: If a circle has a radius of 7 cm, what is its circumference? (Use π ≈ 3.14)

Options:

Correct Answer: 43.96 cm

Solution:

Circumference = 2 * π * radius = 2 * 3.14 * 7 ≈ 43.96 cm.

If a circle has a radius of 7 cm, what is its circumference? (Use π ≈ 3.14)

If a circle has a radius of 7 cm, what is its circumference? (Use π ≈ 3.14)

Step 1: Identify the formula for the circumference of a circle, which is Circumference = 2 * π * radius.
Step 2: Substitute the value of the radius into the formula. Here, the radius is 7 cm.
Step 3: Replace π with the approximate value of 3.14 in the formula.
Step 4: Calculate the multiplication: 2 * 3.14 * 7.
Step 5: First, calculate 2 * 3.14, which equals 6.28.
Step 6: Now, multiply 6.28 by 7 to get the final circumference.
Step 7: The result of 6.28 * 7 is approximately 43.96 cm.

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