More ideas from paul
Triangle Measurement Interactive Notebook Page - showing proof that the interior angles of a triangle have a sum of 180 degrees. So much better than just telling students. Show the proof.

Triangle Measurement Interactive Notebook Page. Rip off the angles and put all the vertices together to show why they add to equal 180 degrees!

Geome-tree Quadrilateral Interactive Notebook Page...l make shapes with flaps to flip up to show definition of each figure or properties

Geome-tree Quadrilateral Interactive Notebook Page.make shapes with flaps to flip up to show definition of each figure or properties