Posted by **mary** on Monday, April 18, 2011 at 4:19pm.

Need help I missed this problem on my test. My answer was 31.8in^2. The right answer was 8.0in^2

How should I have worked the problem:

A pie has a diameter of 9 inches. Each slice of the pie has a central angle of 45 degrees. What is the area of each slice of pie?

- Geometry -
**Ms. Sue**, Monday, April 18, 2011 at 4:28pm
A = pi * r^2

A = 3.14 * 4.5^2

A = 3.14 * 20.25

A = 63.585 sq. in.

The pie is divided into 8 pieces.

63.585 / 8 = 7.948 sq. in. >> rounded = 8 square inches.

- Geometry -
**anna**, Thursday, May 22, 2014 at 11:42am
Find the area of a regular octagon with a perimeter of 80 inches round to the nearest tenth

## Answer this Question

## Related Questions

- Geometry - I missed this problem on my test. I had 23 ft and the correct answer ...
- Geometry - I have worked this problem several times and get the same answer but ...
- Geometry - Need help solving this problem so confused The tries of an automobile...
- Geometry - How tall would a glass (in the shape of a right circular cylinder)...
- Algebra - I have this math probelm z-(3z)/(2-z)=(6)/(z-2) in my book it says to ...
- Grade 10 Math - I've missed quite alot of school because I was sick and when I ...
- math - Small cubes with edge lengths of 1/4 inch will be packed into the right ...
- calculus - a pie dish has a base diameter 8 inches and a top diameter 10 inches ...
- Math - 1. (5yd 2ft) + (7yd 1ft) = ? 2. (6mi 10ft 4in) - (4mi 8ft 8in) = ? 3. 5(...
- Algebra - 3x[1]+x[2]<=12,x[1]+x[2]<=15,z=2x[1]+x[2] I need the simplex for...

More Related Questions