Polygons Looking for a fun interactive teaching idea for classifying polygons based on attributes? Well look no further as 2D Shape Attributes of Polygon PowerPoint Presentation, for CCSS 3.G.1, will serve as an exciting lesson plan for 3rd grade elementary school math classrooms. This is a great resource to incorporate into your unit as a guided math lesson, introduction or review exercise, and whole class activity.This 2D shapes and attributes PowerPoint includes 20 colorful instructional slid