If a circle has a radius of 7 cm, what is its circumference? (Use π = 22/7)

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Question: If a circle has a radius of 7 cm, what is its circumference? (Use π = 22/7)

Options:

Correct Answer: 44 cm

Solution:

Circumference = 2πr = 2 × (22/7) × 7 = 44 cm.

If a circle has a radius of 7 cm, what is its circumference? (Use π = 22/7)

If a circle has a radius of 7 cm, what is its circumference? (Use π = 22/7)

Step 1: Understand the formula for circumference of a circle, which is Circumference = 2πr.
Step 2: Identify the radius (r) of the circle. In this case, the radius is 7 cm.
Step 3: Substitute the value of π (which is 22/7) and the radius (7 cm) into the formula: Circumference = 2 × (22/7) × 7.
Step 4: Calculate 2 × (22/7) = 44/7.
Step 5: Now multiply (44/7) by 7. The 7s cancel out, leaving you with 44.
Step 6: Therefore, the circumference of the circle is 44 cm.

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