If the radius is tripled then the Area will be greater by a factor of 9.
And the circumference will be greater by a factor of 3.
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The original volume is multiplied by 27.
Circles with the same radius are congruent circles.
It's not a circle if it's radius of 5 degrees. If it's 5 cm radius, then 12 circles.
congruent
The ratio of radius to diameter for any circle is 1/2