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Circumference = pi x diameter so if the radius is 5 then the diameter is 10

Circumference = pi x 10 = 31.415

If we triple the radius to 15, then the diameter is 30, so

Circumference = pi x 30 = 94.245

Which looks like triple the first circumference. So if the radius is tripled, the circumference is also tripled.

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Q: If the radius of a circle is tripled what happens to the circumference?

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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.

The circumference of a circle = 2*pi*r. if you triple r, the circumference is tripled also.

The circle becomes an oval

It will be twice the size of the tripled radius

If the radius of a circle doubles, the circumference doubles, and so does the diameter.

The circumference of a circle increases with an increase in the radius as it is directly proportional its radius.

The formula for the area of a circle is, A = πr2 If the area is tripled then the larger circle has an area of A2 = πR2 (where R is the new radius) But, πR2 = 3πr2 : R2 = 3r2 : R = r√3 The circumference of the original circle was 2πr. The circumference of the larger circle is 2πR = 2πr√3 Therefore, if the area is tripled, then the circumference increases by √3.

The circumference also doubles.

The circumference also doubles.

Circumference(C) = 2Ï€r C is directly proportional to r. If radius is tripled then circumference becomes three times of the initial. Since the radius is tripled so the new radius is 3r. New circumference(C') = 2Ï€(3r) = 3 x (2Ï€r) = 3 x C Area = Ï€r2 A is directly proportional to r2. If radius is tripled then area becomes 9{square of 3} times of the initial. New radius is 3r. New Area(A') = Ï€ (3r)2 = 9 x Ï€ r2 = 9 x A.

It gets bigger.

It splits

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