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What is the diameter of a circle with a radius of 9 cm? (2022)

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Question: What is the diameter of a circle with a radius of 9 cm? (2022)

Options:

  1. 9 cm
  2. 18 cm
  3. 27 cm
  4. 36 cm

Correct Answer: 18 cm

Solution: 

Diameter = 2 * radius = 2 * 9 cm = 18 cm.

What is the diameter of a circle with a radius of 9 cm? (2022)

Practice Questions

Q1
What is the diameter of a circle with a radius of 9 cm? (2022)
  1. 9 cm
  2. 18 cm
  3. 27 cm
  4. 36 cm

Questions & Step-by-Step Solutions

What is the diameter of a circle with a radius of 9 cm? (2022)
  • Step 1: Understand that the radius of a circle is the distance from the center to the 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 9 cm, we will use this value in our calculation.
  • Step 4: Multiply the radius by 2 to find the diameter: 2 * 9 cm.
  • Step 5: Calculate the result: 2 * 9 cm = 18 cm.
  • Step 6: Conclude that the diameter of the circle is 18 cm.
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