Understand that attributes belonging to a category of two-dimensional figures also belong to all subcategories of that category. For example, all rectangles have four right angles and squares are rectangles, so all squares have four right angles.
当学习不同2-D形状的属性时,可使用的90段交互式PowerPoint。
A 2-D shapes poster with 16 common shapes, as well as information characterizing each shape.
Use this teacher-created resource for teaching about regular and irregular polygons.
2-D Shapes and their names, diagrams, and properties on individual posters.