Posted by **Thomas** on Sunday, January 5, 2014 at 10:42pm.

A circle has an area of 25 pi cm^2.If a circle is drawn within that circle with a diameter equal to the radius of the first circle, what is the area of the second circle?

a. 2 1/2 pi cm^2

b. 4 1/4 pi cm^2

c. 5 1/4 pi cm^2

d. 6 1/4 pi cm^2

e. 7 1/2 pi cm^2

please answer and explain

- math -
**Reiny**, Sunday, January 5, 2014 at 10:53pm
Since the radius of the new circle is 1/2 of the original, and the radius is squared in the area formula, the new area must be 1/4 of the original

so what is (1/4) of 25 ?

- math -
**Thomas**, Sunday, January 5, 2014 at 10:56pm
d. 6 1/4 pi cm^2

- math -
**Reiny**, Sunday, January 5, 2014 at 11:03pm
correct

- math -
**ricardo**, Wednesday, March 5, 2014 at 3:39pm
The diameter of a circle is 10 meters. What is the area of the circle? (Use 3.14 for mc004-1.jpg and round to the nearest tenth.)

- math -
**darrius**, Friday, February 20, 2015 at 9:19am
The diameter of a circle is 10 meters. What is the area of the circle? (Use 3.14 for mc004-1.jpg and round to the nearest tenth.)

## Answer This Question

## Related Questions

- 8th grade math - circle A has a raduis that is twice the length og the raduis of...
- summer math hw - one circle has a diameter of 10 inches. a second circle has a ...
- MATH HELP PLEASE - You are given two different circles. The diameter of the ...
- math - The number of square units in the area of circle P is equal to the number...
- math - The area of a circle is given by the formula A = ğr2, where r is the ...
- 8th grade math - The radius of circle M is 3 times the radius of circle P. If ...
- Updated Math Question - The radius of circle A is 9 times greater than the ...
- Maths - 1. In the xy-coordinate plane, point A is the midpoint of the segment ...
- Math - A shaded circle has a diameter of 12 feet. Within the circle, is another ...
- math - I am supposed to find the area of a segment of a circle. The circle is ...

More Related Questions