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A '''polygon''' is a union of disjoint [[line segment]]s that is [[connectedness|connected]].
A '''polygon''' is a union of disjoint [[line segment]]s that is [[connectedness|connected]].
A [[Regular polygon]] has all sides equal and all angles equal.
A [[regular polygon]] has all sides equal and all angles equal.
Types, by number of sides.
Types, by number of sides.
The [[perimeter]] of a regular polygon is equal to <math>n sin\frac{180}{n} (2) (r)</math>, where ''r'' equals the length of the radius.<br>
The [[perimeter]] of a regular polygon is equal to <math>n sin\frac{180}{n} (2) (r)</math>, where ''r'' equals the length of the radius.<br>
The [[area]] of a regular polygon is equal to <math>n sin\frac{180}{n}cos\frac{180}{n}(r^2)</math>
The [[area]] of a regular polygon is equal to <math>n sin\frac{180}{n}cos\frac{180}{n}(r^2)</math>
[[Category:Geometry]]
[[Category:Plane Geometry]]