11.3 Polygons
See table (Text)
Def. Curve—lies in a plane and is connected (it can be drawn without lifting a pencil).
Def. Closed curve—can be drawn with the starting and stopping points the same.
Def. Simple curve—lines do not cross themselves and only two extensions from a single point.
Def. Polygonal curve—consists of all line segments.
Def. Polygon—closed, simple, polygonal curves.
Def. Convex curves—closed, simple and have no indentations.
Def. Concave curves—closed, simple, and not convex.
Polygons |
Number of Sides or Vertices |
Triangle |
3 |
Quadrilateral |
4 |
Pentagon |
5 |
Hexagon |
6 |
Heptagon |
7 |
Octagon |
8 |
Nonagon |
9 |
Decagon |
10 |
n-gon |
n |
Def. Interior angle of a polygon—any two sides of a polygon having a common vertex.
Def. Exterior angle of a convex polygon—determined by a side of the polygon and the extension of a contiguous side of the polygon.
Def. Congruent parts—parts that are of the same size and shape.
Def. Regular Polygons—polygons in which all interior angles are congruent and all sides are congruent.
Definitions of terms: