2D shapes are boring. Ah ... Whereas cuboids, they're like a stretched cube and have 2 square faces and 4 rectangular faces. Oh yeah. Alright. Please make him stop. Right, what about triangles?

Look, if you draw a line straight down and close the shape it makes a rectangle. A rectangle has 4 sides. It has two short sides and 2 long sides. A rectangle also has 4 corners. These are where ...