Two-dimensional (2D) shapes are completely flat. They have two dimensions – length and width. A polygon is a closed 2D shape with straight sides that meet at vertices. Polygons can be regular or ...

Big Idea – We can describe, measure, and compare spatial relationships. to build on students' knowledge of triangle and develop students' reasoning with properties of different classes of triangles to ...

Big Idea – We can describe, measure, and compare spatial relationships. to build on students' knowledge of triangle and develop students' reasoning with properties of different classes of triangles to ...

Help children to use, discuss and think about shapes in mathematical terms with suggestions from Sheila Ebbutt and Carole Skinner. Shapes of things we can see or touch are mostly too complex to ...

Children should be provided with a large variety of shapes in a range of situations to stimulate learning. Nicole Weinstein suggests some ideas. Shapes are everywhere-regular and irregular, in 2D and ...