5.G.B.4

Classify two-dimensional figures in a hierarchy based on properties.

Learn the definition of polygon, and start to flesh out a heirarchy of quadrilaterals. Relate to heirarchies in nature. Classification is fundamental to the way humans think, so being comfortable with this concept is very important, not only to the studentâ€™s further exploration of math, but to reasoning in general. Here's a video covering all the concepts necessary to introduce polygons.

Notes: The Common Core is too vague. Which properties?