Vertex: geometry games kids can actually play
Start here: Angle Types · Sort angles into acute, right, obtuse and more — eight rounds. · About 3 minutes
Vertex makes geometry hands-on across 14 interactive games. Kids sort angles, hunt lines of symmetry, plot coordinates, and work with area, volume, and the Pythagorean theorem — building intuition by doing, not just watching. Start with Angle Types: eight quick rounds, about three minutes. It's free and has no ads. Diffy measures product use to improve the service.
What kids learn
- Classifying, estimating, and calculating angles with the key angle rules
- Identifying polygons and their interior and exterior angle sums
- Symmetry and rigid transformations: translation, rotation, and reflection
- Plotting and reading points across all four quadrants of the coordinate plane
- Measurement: perimeter, area, circle formulas, volume, and surface area
- Advanced reasoning: the Pythagorean theorem, similar triangles, and 3D nets
How it works
Each topic is its own interactive mini-game — sort an angle by size, slide an estimate, draw shapes on a grid, plot points, or drag a transformation onto a target. Games are tagged Beginner, Intermediate, or Advanced, and kids pick what to play from a hub. Each one awards stars as skills click into place.
Kids can play without signing in; guest stars stay until you reload or close the page. A grown-up signs in once and adds a player for each kid, so Vertex's stars and progress save to your account and follow you to any device.
Also try
- MathBlastAges 6–13
45-second math blasts and calm practice: sums, tables, fractions.
Play MathBlast → - MindMazeAges 7–14
Sudoku, nonograms and deduction puzzles that level up.
Play MindMaze →
Ready to play Vertex?
It's free and has no ads. Diffy measures product use to improve the service. Ages 9–15.