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If a circle's area is 78.5 cm², what is its radius?

Practice Questions

Q1
If a circle's area is 78.5 cm², what is its radius?
  1. 5 cm
  2. 7 cm
  3. 6 cm
  4. 4 cm

Questions & Step-by-Step Solutions

If a circle's area is 78.5 cm², what is its radius?
  • Area of a Circle – Understanding the formula for the area of a circle (A = πr²) and how to manipulate it to find the radius.
  • Square Root Calculation – Applying the square root function correctly to derive the radius from the area.
  • Use of π – Recognizing the value of π in calculations and its significance in geometry.
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