Posted by **Cindy** on Wednesday, February 12, 2014 at 4:39pm.

Find the area of a circle with the given radius or diameter. Round your answer to the nearest tenth.

Diameter = 42.0 mm

- MATH -
**Ms. Sue**, Wednesday, February 12, 2014 at 4:45pm
A = pi * r^2

A = 3.14 * 21^2

A = 1,384.7 sq. mm

- MATH -
**Damon**, Wednesday, February 12, 2014 at 4:45pm
radius = 42.0/2 = 21.0

A = pi r^2

= 3.14159 * 21 * 21

round answer to nearest tenth

- MATH -
**Cindy~Never Mind!**, Wednesday, February 12, 2014 at 4:46pm
Never Mind!

Don't Answer this question!

- MATH -
**Damon**, Wednesday, February 12, 2014 at 4:46pm
to square 21:

(20+1)(20+1) = 400 + 40 + 1 = 441

- MATH -
**Damon**, Wednesday, February 12, 2014 at 4:47pm
Oh well :(

- MATH -
**Cindy~Never Mind!**, Wednesday, February 12, 2014 at 4:47pm
OK, Thanks!

Ms. Sue and Damon!

But I already got the answer!

It was 1,384.7

- MATH -
**Cindy~Never Mind!**, Wednesday, February 12, 2014 at 4:48pm
You guys are very kind! :)

- MATH -
**Damon**, Wednesday, February 12, 2014 at 5:00pm
You are welcome :)

be sure you want mm^2, usually that would be converted to cm^2 or m^2

## Answer This Question

## Related Questions

- Math - 3.)Find the diameter of a circle with a circumference of 50 mm. Round ...
- Geometry - 1. Find the diameter of a circle with a circumference of 50 mm. Round...
- Math - Find the area of the given circle.Round to the nearest tenth. The ...
- Math. - 1. Find the area of the given circle. Round to the nearest tenth. *...
- math - I'm asked to find the circumference of a circle to the nearest tenth and ...
- Math - Please check! - 1. Find the circumference of a circle with a diameter of ...
- math - 1. Find the area of a circle whose diameter is 5.1 centimeters (cm). Use ...
- math - . Find the volume of the sphere with a radius of 9. Use ð = 3.14 and ...
- MAth - A sphere has a surface area of 28.26 in2. Find the diameter in inches, of...
- Circumference and Area of Circles - can someone help me with these:Find the ...

More Related Questions