# geometry

find the sum of the measures of the interior angles of a 13-gon

1. 👍 0
2. 👎 0
3. 👁 49
1. the sum of the interior angles of an n-gon is
180(n-2), so ....

1. 👍 0
2. 👎 0
posted by Reiny

## Similar Questions

1. ### math

find the sum of the measures of the intieior angles of each polygon. -hexagon -pentagon -quadrilateral -octagon -16-gon -27-gon The key is the sum of the measures. All of these figures have the same total number of degrees in

asked by kristen on March 12, 2007
2. ### geometry

If the sum of the measures of the interior angles of a convex n-gon is equal to the sum of the measures of the exterior angles, how many sides does the n-gon have?

asked by alisa on November 14, 2011
3. ### Math

1. The measure of an interior angle of a regular polygon is 20 more than thrice the measure of its adjacent exterior angle. Find the number of sides of the polygon and its total number of diagonals. 2. Find the sum and difference

asked by Brianna on October 14, 2014
4. ### geometry

Find the sum of the measures of the intieior angles of each polygon. -hexagon -pentagon -quadrilateral -octagon -16-gon -27-gon please

asked by hello on February 21, 2018
5. ### Geometry

What is the sum of the measures of the interior angles of a convex octagon? What is the sum of the measures of the interior angles of a convex decagon? What is the measure of one interior angle of a regular polygon with 20 sides?

asked by Alan on February 3, 2010
6. ### math

Find the measure of the interior angle in a regular polygon if the ratio of the sum of the measures of the interior angles to the sum of the measures of the exterior angels is 4

asked by johanna on December 12, 2014
7. ### Geometry

1. How many sides does a regular polygon have if one exterior angle is 90 degrees? 3 4 5 6 2. The measures of three angles of a quadrilateral are 80, 90, and 103 degrees. Find the measure of the fourth angle. 67 77 87 97 3. The

asked by Justin on November 30, 2010
8. ### Math

The sum of the degrees of the interior angles of a triangle is _____ degrees What is the sum of the interior angles of a parallelogram ? What is the sum of the interior angles of a rhombus? What is the sum of the interior angles

asked by Mackenzie on June 4, 2014
9. ### Geometry

Find the sum of the measures of the exterior angles of a convex 39-gon?

asked by Mariel on March 21, 2013
10. ### geometry

1. the sum of the interior angle measures of a convex dodecagon. 2. the measure of each interior angle of a regular 20-gon

asked by anonymous on November 21, 2013

More Similar Questions