Flat to 3D

Flat shapes have area. Three-dimensional shapes have volume — the amount of space they enclose. A box, a ball, a cylinder, a cone: each has a formula that links its dimensions to the space inside. Master those formulas and you can measure the world around you.

The jump from 2D to 3D adds complexity but also realism. Real objects have depth. A box of cereal is a rectangular prism — length, width, and height all matter. This is the math behind packaging, architecture, and manufacturing.