2 years ago

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

Mathematics

1 answer:

ra1l [238]2 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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