is a closed plane figure bounded by straight lines.
Polygon
is closed polygonal chain of line segments that do not cross each other.
Simple Polygon
is defined as a polygon with all its interior angles less than 180°.
Convex Polygon
is defined as a polygon with one or more interior angles greater than 180°.
Concave Polygon
is a polygon whose sides cross over each other one or more times.
Complex Polygon
a polygon having equal sides and equal angles.
Regular Polygon
Sum of Interior Angles of a Polygon
180∘(𝑛 − 2)
Sum of Exterior Angles
360∘
Measure of an Interior Angle of a Regular Polygon
(180∘(𝑛 − 2))/ 𝑛
Measure of an Exterior Angle of a Regular Polygon
360/n