Solid Objects  
Summary 
solids are three dimensional objects which have length, width and height. examples of common solids are cubes, cuboids, pyramids, cones, cylinders and spheres. the cross section of a solid is a "slice" of a solid through a given direction. a prism is a solid with the same cross section for all of its length. a platonic solid is a solid with all of its faces the same regular shape. there are only 5 of them. 
Key Skills 

Vocabulary 
cross section, prism, cuboid, rectangular prism, cube, triangular prism, pyramid, cone, cylinder, sphere. 