Triangles are 2D shape    it has 3 vertices 3 sides. Circle  are 2D  shape it has 0 vertices   0 sides . Rectangle  is a 2D shape. square  is a 2D shape    it has 4 vertices   4  sides . sphere Is a 3D shape   with 0 vertices  0 faces it can roll it cant slide and it cant stack. Cubes have 6 vertices and it has 8 faces it cant roll and it can slide it can stack. I had lots of fun learning about objects and shapes!