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If the diameter of a circle is 10 cm, what is the circumference of the circle?

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Question: If the diameter of a circle is 10 cm, what is the circumference of the circle?

Options:

  1. 31.4 cm
  2. 20 cm
  3. 15.7 cm
  4. 25 cm

Correct Answer: 31.4 cm

Solution: 

The circumference of a circle is given by the formula C = πd. For d = 10 cm, C = π(10) ≈ 31.4 cm.

If the diameter of a circle is 10 cm, what is the circumference of the circle?

Practice Questions

Q1
If the diameter of a circle is 10 cm, what is the circumference of the circle?
  1. 31.4 cm
  2. 20 cm
  3. 15.7 cm
  4. 25 cm

Questions & Step-by-Step Solutions

If the diameter of a circle is 10 cm, what is the circumference of the circle?
  • Step 1: Understand that the diameter of the circle is given as 10 cm.
  • Step 2: Recall the formula for the circumference of a circle, which is C = Ï€d, where d is the diameter.
  • Step 3: Substitute the diameter (10 cm) into the formula: C = Ï€(10).
  • Step 4: Calculate the circumference using the value of Ï€ (approximately 3.14): C ≈ 3.14 * 10.
  • Step 5: Perform the multiplication: C ≈ 31.4 cm.
  • Circumference of a Circle – The circumference is the distance around a circle, calculated using the formula C = Ï€d, where d is the diameter.
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