Euclidea
Practice geometric constructions with a straightedge and compass in Euclidea.
About Euclidea
Euclidea is a puzzle game for web and Android focused on straightedge and compass constructions. It presents more than 120 levels and 11 tutorials that cover basic tasks such as line and angle bisectors and perpendiculars, as well as later topics such as tangents, regular hexagons, and the golden section.
Players draw constructions with on-screen tools, and the system checks solutions automatically. Scores are based on completing tasks in the fewest possible moves. The site includes hints and an Explore mode, 10 construction tools, and shortcuts that are added to the toolbox after key constructions are learned. A Hand tool allows dragging of base points to reshape a construction and observe how it changes.
Euclidea suits students, teachers, and puzzle players who want structured practice in Euclidean geometry.
Key features
- Over 120 straightedge and compass construction levels
- 11 tutorials covering bisectors, perpendiculars and parallels
- Automatic verification of solutions with move-based scoring
- Explore mode and hints for solving tasks
- Dynamic constructions that reshape when dragging points
- Unlockable shortcuts for repeated constructions
- Structured progression from basics to advanced tasks
- Automatic checking of solutions
- Available on web and Android
- Dynamic dragging shows how constructions change
Euclidea at a glance
- Website
- euclidea.xyz
- Category
- Gaming › Browser Puzzle Games
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Android, Web
- Open source
- Not stated
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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