Your solid geometry is weak. A pyramid has FOUR triangular sides and a square/rectangular base for a total of FIVE sides.
Check around in chat if you don't believe it.
Originally Posted by Chainsaw Anthropologist
Not to be picky, but a pyramid can have 3 sides with a triangle base for a total of 4 sides. This is the minimum number of sides possible for a 3d object with only flat sides. And, you can actually have as many sides as you want depending on the shape of the base.
Its late, I cannot sleep and I got an A in geometry.