# 9.12: Polygon Classification

Difficulty Level:

**At Grade**Created by: CK-12Estimated6 minsto complete

%

Progress

**Practice**Polygon Classification

Practice

Progress

Estimated6 minsto complete

%

Practice Now

Concave

Concave

A concave polygon has at least one interior angle greater than 180 degrees. A common way to identify a concave polygon is to look for a "caved-in" side of the polygon.Convex

Convex

A convex polygon contains no interior angles greater than 180 degrees.Decagon

Decagon

A decagon is a ten sided polygon.Diagonal

Diagonal

A diagonal is a line segment in a polygon that connects nonconsecutive verticesExterior angles

Exterior angles

An exterior angle is the angle formed by one side of a polygon and the extension of the adjacent side.Heptagon

Heptagon

A heptagon is a seven sided polygon.Hexagon

Hexagon

A hexagon is a six sided polygon.Interior angles

Interior angles

Interior angles are the angles inside a figure.Nonagon

Nonagon

A nonagon is a nine sided polygon.Octagon

Octagon

An octagon is an eight sided polygon.Pentagon

Pentagon

A pentagon is a five sided polygon.Polygon

Polygon

A polygon is a simple closed figure with at least three straight sides.Regular Polygon

Regular Polygon

A regular polygon is a polygon with all sides the same length and all angles the same measure.Vertices

Vertices

Vertices are points where line segments intersect.Equilateral

Equilateral

A polygon is equilateral if all of its sides are the same length.### Image Attributions

Show
Hide
Details

Description

Classify different types of polygons by their number of sides.

Learning Objectives

None

Related Materials

Difficulty Level:

At Grade
Authors:

Tags:

Subjects:

## Concept Nodes:

Grades:

Date Created:

Oct 29, 2012
Last Modified:

Jun 05, 2016
Vocabulary

None

Files can only be attached to the latest version of Modality