Interior And Exterior Angles Of Polygons Corbettmaths. Consider for instance the pentagon pictured below. In this video I will take you through everything you need to know in order to answer basic questions about the angles of polygons.
Lesson power point on exterior angles of polygons please feel free to leave a comment. Report this resource to let us know if it violates our terms and conditions. So we get text interior angle cdb 180 y.
The formula for calculating the size of an interior angle in a regular polygon is.
All the interior angles in a regular polygon are equal. Solution a Interior angle exterior angle 180 Interior angle 180 40 140 b The number of sides can be determined by dividing 360 by the size of the exterior angles giving 360 40 9 so the polygon has 9 sides. Report this resource to let us know if it violates our terms and conditions. Therefore all its exterior angles measure the same as well that is 120 degrees.