🎓 Deeper Dive — Adults

Geometry studies shape, size, and position. Pythagoras' theorem for right triangles: a² + b² = c² is the most-used formula in engineering.

Area formulas: rectangle = l×w; triangle = ½bh; circle = πr².

3D volumes: cube = s³; sphere = (4/3)πr³; cylinder = πr²h.

Coordinate geometry (Descartes) lets you describe any point as (x, y) and any shape as an equation.