Step-by-Step Geometry

Every step of the solution lights up the matching part of the figure - in 2D and full, rotatable 3D. Then it is your turn, with the same step-by-step check behind every practice question.

Topics

• Flat shapes: squares, rectangles, triangles, and circles on grid paper - area, perimeter, circumference, and working backwards.
• Points, distance and slope: Pythagoras on the coordinate grid, midpoints, and rise over run.
• Solid shapes: boxes, cylinders, cones, and spheres - volume and surface area on rotatable 3D figures.
• 3D coordinate geometry: distance and midpoint between 3D points, steepness in space, and boxes built from corner coordinates - volume, surface area, and the space diagonal.

Each topic has multiple worked examples plus 20 practice questions; after you answer, the same step-by-step derivation replays on the figure so you can verify your method. The first examples in every topic are free.

Prefer to explore first? Visit the 3D Math Lab.