If the radius of a circle is doubled, what happens to its area? (2020)
Practice Questions
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Q1
If the radius of a circle is doubled, what happens to its area? (2020)
It remains the same
It doubles
It triples
It quadruples
The area of a circle is given by A = πr². If the radius is doubled (r becomes 2r), the new area is A' = π(2r)² = 4πr², which is four times the original area.
Questions & Step-by-step Solutions
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Q
Q: If the radius of a circle is doubled, what happens to its area? (2020)
Solution: The area of a circle is given by A = πr². If the radius is doubled (r becomes 2r), the new area is A' = π(2r)² = 4πr², which is four times the original area.
