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If a circle has a radius of 3 cm, what is its diameter?

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Question: If a circle has a radius of 3 cm, what is its diameter?

Options:

  1. 3 cm
  2. 6 cm
  3. 9 cm
  4. 12 cm

Correct Answer: 6 cm

Solution: 

Diameter = 2 × radius = 2 × 3 = 6 cm.

If a circle has a radius of 3 cm, what is its diameter?

Practice Questions

Q1
If a circle has a radius of 3 cm, what is its diameter?
  1. 3 cm
  2. 6 cm
  3. 9 cm
  4. 12 cm

Questions & Step-by-Step Solutions

If a circle has a radius of 3 cm, what is its diameter?
  • Step 1: Understand that the radius of a circle is the distance from the center of the circle to any point on its edge.
  • Step 2: Know that the diameter of a circle is twice the length of the radius.
  • Step 3: Since the radius is given as 3 cm, we will use this value to find the diameter.
  • Step 4: Multiply the radius by 2: 2 × 3 cm.
  • Step 5: Calculate the result: 2 × 3 = 6 cm.
  • Step 6: Conclude that the diameter of the circle is 6 cm.
  • Circle Properties – Understanding the relationship between radius and diameter in a circle.
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