# geometry

posted by .

by what factor must the radius of a circle be multiplied to make the area of the cicle 3 times as large?

• geometry -

area is proporationalto the square of radius.

## Similar Questions

1. ### math

suppose you copy the circle using a size factor of 150%.what will bet he radius,diameter,circumference,and the area of the image?
2. ### honors geometry

A belt wrapped tightly around cicle O forms a 60 degree angle at P, a point outside the circle. Find the length of the belt if cicle O has a radius of 9.
3. ### geometry

If you have a circle in a square and r is the radius of the cicle and x is the measurement outside the square what would the formula be to find the area of the whole square using x and r?
4. ### Math

The radius of circle A is 9 times greater than the radius of circle B. Which of the following statements is true?
5. ### Updated Math Question

The radius of circle A is 9 times greater than the radius of circle B. Which of the following statements is true?
6. ### Geometry

A circle with a radius of 1/2 ft is dilated by a scale factor of 8. Which statements about the new circle are true?
7. ### Geometry

The radius of circle a (which is 6) is multiplied by 1/2. Describe the effect of the change of the area.
8. ### GEOMETRY

THE area of circle B is 25 times greater than the area of circle A. The radius of circle A is 3. What is the radius of circle B?
9. ### math

How does the area of a circle change if the radius is multiplied by a factor of n, where n is a whole number?
10. ### math

the radius AB of a cicle is 5 centimeter.the distance of a line,CD from the center of the circle is 4 centimetre.how will I get the area of ABCD?

More Similar Questions