Monday

December 22, 2014

December 22, 2014

Posted by **alisa** on Monday, November 14, 2011 at 7:14pm.

- geometry -
**Reiny**, Monday, November 14, 2011 at 7:50pmlet the number of sides be n

180(n-2)/n = 140

180n - 360 = 140n

40n = 360

n = 9

9-sided regular polygon, a nonagon

**Answer this Question**

**Related Questions**

Math - 1. The measure of an interior angle of a regular polygon is 20 more than ...

geometry - The Polygon Angle-Sum Theorem states the following: The sum of the ...

geometry - 1. An exterior angle of a regular polygon measures 30 degrees. What ...

Geometry - 1. How many sides does a regular polygon have if one exterior angle ...

math - Each interior angle of a regular polygon is 140 degree. the number of ...

Geometry - In a regular polygon (equal sides and angles), you use (n-2)180 to ...

Math - Are the statements Always, Sometimes or Never. Please explain why. Thanks...

Geometry - A regular polygon has an exterior angel measure of (x+3) Degrees and ...

math--fast help please - Find the interior and exterior angle measurements of a ...

algebra - how do you measure the interior angle and exterior angle of the ...