# Classifying Polygons ppt

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### Classifying Polygons :

Classifying Polygons Polygon – a closed plane figure whose sides are segments that intersect only at their endpoints. (has 3 or more sides that are all straight)

### Slide 2:

Polygons are named according to the number of sides.  The names of the most common polygons are given below:

### Slide 3:

Names of other polygons:

### Names of Polygons by Number of Sides and Angles :

Names of Polygons by Number of Sides and Angles

### The following figures are NOT Polygons: :

The following figures are NOT Polygons:

### Regular Polygons :

Regular Polygons All sides have the same length All angles have the same measure Examples of Regular Polygons:

### Irregular Polygons :

Irregular Polygons If a polygon is not a regular polygon, then it is said to be an irregular polygon. For example, the quadrilateral shown below is an irregular polygon.

### Concave Polygons :

Concave Polygons Has one or more angles that are collapsed or dented in Has an interior angle that measures more than 180º Examples of Concave Polygons:

### Convex Polygons :

Convex Polygons All interior angles are less than 180º Examples of Convex Polygons:

### Concave and Convex Polygons :

Concave and Convex Polygons http://www.mathopenref.com/polygonconvex.html

### Student Polygon Video :

Student Polygon Video