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Q: When the radius of a circle is tripled what happens to the perimeter and area of the circle?

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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.

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

2*pi*radius = perimeter or circumference of a circle radius = circumference/2*pi

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

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.

Because the perimeter (circumference) is 2*pi*r is proportional to r. The area a = pi * r2 is proportional to r2

No.

it looks like a circle.

The circumference of a circle with a radius of 5cm is: 31.42 cm

No because the perimeter of a circle is its circumference

The perimeter or circumference of a circle = 2*pi*radius or pi*diameter

The perimeter which is the circumference of a circle is: pi*diameter or 2*pi*radius

A line of any length may act as the radius of a circle. The radius is the distance from the centre to the perimeter of a circle.

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.

You get 2 circles of diameter. If you were trying to find a perimeter, Never double the diameter. If you have a radius, You have to double it to get a perimeter.

Radius of a circle= Perimeter of the circle/2*pi Radius is half the diameter Radius is the length of a straight line from the center point of the circle to the edge of the circle.

The radius of a circle is a line that starts at the center of the circle and ends somewhere along the perimeter of the circle. The diameter is a line that starts at the perimeter of a circle, goes through the center of the circle, and ends at the opposite perimeter of the circle. This a diameter is twice as long as a radius and can be thought or as consisting of two radii.

perimeter = pi * diameter, or 2 * pi * radius

Its radius.

Radius = 40/2pi cm

If 'R' is the radius of the circle, then-- area of the circle is [ pi R2]-- perimeter of the circle is [ 2 pi R ]

Circumference or perimeter = 2*pi*radius or pi*diameter

you can divide the perimeter(circumference) by pi(3.14) and then once you get your answer you divide that by two giving you the length of the radius of the circle. ex: perimeter = 34pi 34pi/pi 34/2=diameter 16=radius