POLYGONS

A polygon is a closed geometrical figure bounded by 3 or more line segment

Polygons are named on the basis of their number of sides.

Smallest polygon is triangle(3 sided)

Types of polygons:

Polygon Shape   Numberof Sides

Triangle                   3 sides

Quadrilateral  4 sides

Pentagon          5 sides

Hexagon          6 sides

Heptagon          7 sides

Octagon                  8 sides

Nonagon          9 sides

Decagon          10 sides

Dodecagon          12 sides

Icosagon          20 sides

Hectagon          10 sides

n-gon                  n sides

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Interior Angles of Polygons

An Interior Angle is an angle inside  a shape.

the general rule is:

Sum of Interior Angles = (n−2) × 180°

Each Angle (of a Regular Polygon) = (n−2) × 180° / n