Start by recapping and checking retrieval of 2D and 3D shapes, their names and their properties. Explain that you want to build a model train using 3D shapes (these could be shape models or cardboard ...

Explore four-sided shapes looking at straight lines, curved lines and 2D shapes. What are 3D shapes? Learn about 3D shapes and their properties. What is tessellation? Find out how tessellation is when ...

Two-dimensional (2D) shapes are completely flat. They cannot be picked up. A polygon is a 2D shape with straight sides that meet at vertices. Polygons have names that show the number of sides they ...

There is currently significant interest in 3D fabrication in middle school classrooms. At its best 3D printing can be utilized in authentic design projects that integrate math, science, and technology ...

This journal, titled "The Geometry of Flat and Full: Comparing 2D and 3D Shapes," explores the fundamental differences and relationships between two-dimensional (2D) and three-dimensional (3D) shapes.