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If the radius of a circle is 7 cm, what is its circumference? (2023)

Practice Questions

Q1
If the radius of a circle is 7 cm, what is its circumference? (2023)
  1. 14π cm
  2. 21π cm
  3. 28π cm
  4. 35π cm

Questions & Step-by-Step Solutions

If the radius of a circle is 7 cm, what is its circumference? (2023)
  • Step 1: Understand that the circumference of a circle is calculated using the formula: Circumference = 2πr.
  • Step 2: Identify the radius of the circle, which is given as 7 cm.
  • Step 3: Substitute the radius (r) into the formula: Circumference = 2π × 7 cm.
  • Step 4: Calculate 2 × 7, which equals 14.
  • Step 5: Write the final answer as Circumference = 14π cm.
  • Circumference of a Circle – The circumference of a circle is calculated using the formula C = 2πr, where r is the radius.
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