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The area increases as the square of the radius (or diameter). So if you double the radius you * 4 (quadruple) the area. Treble the radius, you *9 the area.

Q: What happens to the area of a circle when the radius is doubled tripled?

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It will be twice the size of the tripled radius

The area quadruples.

The circumfrence would double Example : C of 5 cm radius circle = 3.14 *2*5 C=3.14 C of 10cm radius circle = 3.14*2*10 C =62.8

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

If you double the diameter of a circle, the area will quadruple (be 4x greater).The area of the circle increases exponentially with the diameter, or more precisely with the radius, which is 1/2 the diameter. A = (pi)r2Doubling the diameter of a circle will quadruple the area (22 =4).This is easily seen in pizzas, where the dough needed for a 16-inch pizza can be used instead to make 4 pizzas with a diameter of 8 inches.---The equation to find the area of a circle is a=(pi)r2. If the diameter is doubled, then the radius is also doubled, because the radius is just half the diameter.The area of a circle once its radius (and therefore diameter) has been doubled can be expressed as follows: a'=(pi)(2r)2, which simplifies to a'=(pi)(4r2).To find the proportion of a' and a, we just divide the second by the first. This gets us[(pi)(4r2)]/[(pi)(r2)]=4

Related questions

The circle becomes an oval

It will be twice the size of the tripled radius

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.

If the radius of a circle is tripled, how is the length of the arc intercepted by a fixed central angle changed?

It quadruples.

The area quadruples.

the area of the circle is increased by 400%

It is increased nine fold. New Area = 9*old area.

If you triple the radius of a circle, the area will increase by 9. Area is proportional to the square of the radius.

A circle does not have volume since it is a 2 dimensional shape. Volume requires 3 dimensions.

A=pir2 a=pi2r2 a=pi4 r2 a increases by 4 times

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.