If you draw a 9-gon and then draw from one vertex all the possible triangle to the other vertices you'll get 7 triangles. Multiply 7 times 180, the number of interior ange measure, and you'll get your answer. 1260
360 degrees
180
If it's a regular 9 sided polygon then each interior angle will measure 140 degrees.
The sum of the exterior angle measures of any polygon is always 360 degrees, regardless of the number of sides. Therefore, for a 22-gon, the sum of the exterior angle measures is also 360 degrees.
360
360 degrees
180
If it's a regular 9 sided polygon then each interior angle will measure 140 degrees.
The sum of the exterior angle measures of any polygon is always 360 degrees, regardless of the number of sides. Therefore, for a 22-gon, the sum of the exterior angle measures is also 360 degrees.
360
720
360
35
180
The sum of the measures of the angles in a figure having 9 sides is 20 degrees each angle.
Sum= 2340 Degrees A+
The sum of the measures of the interior angles of any quadrilateral is 360.(S-2)*180 equals the sum.