Tangram Online — Classic Shape Puzzle Game

Tangram is a classic geometric puzzle that originated in China. A square is cut into seven pieces — two large triangles, one medium triangle, two small triangles, one square, and one parallelogram — and arranged into different silhouettes.

Select a piece and press R to rotate by 45° (Shift+R for counter-clockwise). Press F to flip the parallelogram horizontally — the parallelogram is the only piece that looks different after a flip.

The daily puzzle is a single silhouette picked deterministically from the puzzle library using the current UTC date. Every player sees the same puzzle on the same day, so results are directly comparable.

Yes. Switch to the Designer mode, arrange the seven pieces into any shape, and press Share to copy a link. Anyone opening that link will see your silhouette and try to rebuild it.

Yes. After the first visit, the game is cached by the Timbrica service worker and loads without an internet connection. Progress, best times, and star ratings are stored in the browser.

Tangram is commonly used in schools to teach geometry, spatial reasoning, and problem solving. The three-level hint system keeps young players moving forward without frustration.