This video provides an explanation as to why we cannot see colors of light separately with the naked eye because the wavelengths of of the primary colours interact with each other- they form a white or transparent beam. [0:40]

This video tutorial describes the term lateral face for prisms and pyramids. [2:27]

Geometric solids are explored in this video lesson. The tutorial defines and provides examples of six popular solids. Students can check their understanding with an assessment. [9:03]

This lesson explains the formula and procedure for calculating the volume of a rectangular box. It is 1 of 5 in the series titled "Volume of a Rectangular Box."