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If a circle has a radius of 7 cm, what is the circumference of the circle? (Use

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

Options:

  1. 21.98 cm
  2. 43.96 cm
  3. 14 cm
  4. 49 cm

Correct Answer: 43.96 cm

Solution: 

Circumference = 2Ï€r = 2 * 3.14 * 7 = 43.96 cm.

If a circle has a radius of 7 cm, what is the circumference of the circle? (Use

Practice Questions

Q1
If a circle has a radius of 7 cm, what is the circumference of the circle? (Use π ≈ 3.14)
  1. 21.98 cm
  2. 43.96 cm
  3. 14 cm
  4. 49 cm

Questions & Step-by-Step Solutions

If a circle has a radius of 7 cm, what is the circumference of the circle? (Use π ≈ 3.14)
  • Step 1: Identify the formula for the circumference of a circle, which is Circumference = 2Ï€r.
  • Step 2: Substitute the value of Ï€ with 3.14 in the formula.
  • Step 3: Substitute the radius (r) with 7 cm in the formula.
  • Step 4: Calculate 2 * 3.14 * 7.
  • Step 5: Perform the multiplication: 2 * 3.14 = 6.28.
  • Step 6: Now multiply 6.28 by 7 to get 6.28 * 7 = 43.96.
  • Step 7: The final answer is the circumference of the circle, which is 43.96 cm.
  • Circumference of a Circle – The circumference of a circle is calculated using the formula C = 2Ï€r, where r is the radius.
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