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If a circle's radius is doubled, how does its area change? (2020)

Practice Questions

1 question
Q1
If a circle's radius is doubled, how does its area change? (2020)
  1. It remains the same
  2. It doubles
  3. It triples
  4. It quadruples

Questions & Step-by-step Solutions

1 item
Q
Q: If a circle's radius is doubled, how does its area change? (2020)
Solution: Area = πr². If radius is doubled (2r), new area = π(2r)² = 4πr², which is quadruple the original area.
Steps: 0

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