Multiple choice

If the radius of a circle is tripled, how many times its original value will the new area become?

  1. 3 times

  2. 6 times

  3. 9 times

  4. 12 times

  5. 4.5 times
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Area = pi * r^2. If r becomes 3r, new area = pi * (3r)^2 = 9 * pi * r^2. The area becomes 9 times the original.

AI explanation

The area of a circle is given by the formula A = pi times r squared. If the new radius is three times the original radius, the new area is pi times the quantity three r squared, which equals nine times pi times r squared. The new area becomes 9 times the original area.

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