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What is the circumference of a circle with a radius of 7 cm? (2019)

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Question: What is the circumference of a circle with a radius of 7 cm? (2019)

Options:

  1. 14Ï€ cm
  2. 21Ï€ cm
  3. 7Ï€ cm
  4. 28Ï€ cm

Correct Answer: 14Ï€ cm

Exam Year: 2019

Solution: 

Circumference = 2 * π * radius = 2 * π * 7 = 14π cm

What is the circumference of a circle with a radius of 7 cm? (2019)

Practice Questions

Q1
What is the circumference of a circle with a radius of 7 cm? (2019)
  1. 14Ï€ cm
  2. 21Ï€ cm
  3. 7Ï€ cm
  4. 28Ï€ cm

Questions & Step-by-Step Solutions

What is the circumference of a circle with a radius of 7 cm? (2019)
  • Step 1: Understand that the circumference of a circle is the distance around it.
  • Step 2: Know the formula for circumference: Circumference = 2 * Ï€ * radius.
  • Step 3: Identify the radius of the circle, which is given as 7 cm.
  • Step 4: Substitute the radius into the formula: Circumference = 2 * Ï€ * 7.
  • Step 5: Calculate 2 * 7, which equals 14.
  • Step 6: Write the final answer as Circumference = 14Ï€ cm.
  • Circumference of a Circle – The circumference is the distance around a circle, calculated using the formula C = 2 * Ï€ * r, where r is the radius.
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