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A circle has a radius of 3 cm. What is the length of its diameter?

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Question: A circle has a radius of 3 cm. What is the length of 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 cm = 6 cm.

A circle has a radius of 3 cm. What is the length of its diameter?

Practice Questions

Q1
A circle has a radius of 3 cm. What is the length of its diameter?
  1. 3 cm
  2. 6 cm
  3. 9 cm
  4. 12 cm

Questions & Step-by-Step Solutions

A circle has a radius of 3 cm. What is the length of its diameter?
  • Step 1: Understand that the diameter of a circle is twice the length of the radius.
  • Step 2: Identify the radius given in the question, which is 3 cm.
  • Step 3: Use the formula for diameter, which is Diameter = 2 * radius.
  • Step 4: Substitute the radius into the formula: Diameter = 2 * 3 cm.
  • Step 5: Calculate the result: 2 * 3 cm = 6 cm.
  • Step 6: Conclude that the length of the diameter is 6 cm.
  • Circle Properties – Understanding the relationship between the radius and diameter of a circle, where the diameter is twice the radius.
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