The document discusses formulas for calculating angles in regular polygons. It explains that the sum of interior angles in an n-sided polygon is (n-2)×180 degrees. The central angle of a regular polygon with n sides is calculated as 360 degrees divided by n. Similarly, the exterior angle is 360 degrees divided by n. The interior angle is calculated as 180(n-2) degrees divided by n. Examples are given applying these formulas to triangles, squares, pentagons, hexagons, and octagons.