# Names of Polygons

## Common Core Standard 6.G.1 , 6.G.3, 7.G.6

Many of the shapes in Geometry are polygons. What is a **polygon?** A polygon is a two-dimensional shape that has** straight lines.** A polygon can have anywhere between three and an unlimited number of sides. All of the lines of a polygon connect, which means there is not an opening. Each polygon is named according to it’s the number of sides.

Polygons can also be Concave and Convex. What’s the difference?

When you draw a line through a **Concave polygon **it touches the** concave polygon** in more that two places, but with a **Convex polygon** the line only touches it in two places.