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If the radius of a circle is doubled, how does the area of the circle change?

If the radius of a circle is doubled, how does the area of the circle change?-example-1

1 Answer

8 votes

Answer:

Quadruple the size

Step-by-step explanation:

Step-by-step explanation:

When you enlarge a linear measurement by a scale factor a the area changes by a scale factor a2

So when you double the radius. scale factor 2, the area is increased by a scale factor:

22=4

So the area is quadrupled in this case.

User Edtsech
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