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← Length & Area

Concept · 4 steps · NESA MA4-ARE-C-01

Area of a Rectangle

The one that everything else stands on — triangles, parallelograms, even prisms. Get this rock-solid and the rest of measurement comes easily.

1Where it comes fromArea is just counting the squares inside. Watch them fill. 2How to do itLength × width, with a practice generator to lock it in. 3Where it gets trickyArea vs perimeter, and why area is in square units. 4Out in the wildL-shaped rooms, tiling a floor, and working backwards.

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