The document defines different types of polygons: regular polygons have all sides of equal length and interior angles of equal measure; convex polygons have all interior angles less than 180 degrees; concave polygons have one or more interior angles greater than 180 degrees. It also notes that a quadrilateral is a 4-sided polygon formed by connecting 4 line segments at their vertices to make a closed figure.

1. Regular
Convex
Concave
Number Name
irregular Polygons

3. Line segments linked at four vertices to create a closed figure.
A 4-sided polygon.
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for an
example

4. A polygon that has all sides equal and all interior
angles equal

5. A polygon whose sides are not all the same length or whose interior angles do not
all have the same measure.
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an example

7. A polygon that has all interior angles less than 180°
(Result: All the vertices point 'outwards', away from the center.)
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me

8. A polygon that has one or more interior angles greater than 180°
(Result: some vertices point 'inwards', towards the center.)