Polygons and Polyhedra

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The radius of a regular polygon and formula for finding it.

Formula and description of the perimeter of a polygon.

Definition an properties of an irregular polygon

The interior angles of a polygon and the method for calculating their values.

The incircle of a regular polygon is defined along with its radius and formula for finding it.

The exterior angles of a polygon and the method for calculating their values.

Definition of the diagonals of a polygon, including a formula to calculate the number of them in an n-gon

Definition and properties of a convex polygon

Definition and properties of a concave polygon

Definition of the central angle of a polygon

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