Complete this interactive activity to find out more about 3D shapes and then put your knowledge to the test. Cubes have 6 flat faces which are all the same size. Everyday things that have the shape of ...

2D shapes are flat, plane shapes. Triangles have three sides and three angles that add up to 180°. Quadrilaterals have four sides and four angles that add up to 360°. Constructing triangles Learn how ...

At last, a use for that industrial knitting machine you bought at a yard sale! Carnegie Mellon researchers have created a method that generates knitting patterns for arbitrary 3D shapes, opening the ...