Geometric Hierarchy

Lesson Frame

• We will classify two-dimensional figures in a hierarchy of sets and subsets using graphic organizers based on their attributes and properties.
• I will create a hierarchy of geometric shapes using their critical attributes.

Activity

Today we worked on creating a hierarchy of two-dimensional figures. We create a page of notes:

We began with "Polygons" as the top of our hierarchy.  Next we named the types of Polygons:  Triangles, Quadrilaterals and Any polygon with more than 4 sides.  From their we named our triangles based upon their angles, and then discussed they types of triangles (named for their sides) went with each.  Next we moved to quadrilaterals.  We named a trapezoid and kite as those quadrilaterals that were not parallelograms, then we worked with parallelograms.  Finally, we named the next six polygons that have more than four sides.

Actually my classes seemed to enjoy this process and mentioned that they had come across problems like these in Think Through Math and on their Countdown to STAAR.

Once we completed the note-taking, we jumped into a Countdown to STAAR and then either Think Through Math or Khan.