The array can be shown as 5 groups of 3 showing that 5 x 3 = 15. Or it could be shown as 3 groups of 5 showing that 3 x 5 = 15. This demonstrates that multiplication is commutative. Image caption, ...

Master curved forms in your architectural sketches with the grid method! This tutorial shows you how to use a perspective grid to break down complex curves step by step, making your drawings more ...