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vitfil [10]
3 years ago
14

The radius of a circle is doubled. How does the area change?

Mathematics
1 answer:
ra1l [238]3 years ago
8 0

Answer:

Area increases by a factor of 4

Step-by-step explanation:

The area (A) of a circle is calculated as

A = πr²

If the radius is doubled, that is r = 2r, then

A = π(2r)² = 4πr²

Hence the area has been increased by a factor of 4

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