Check how well you know the geometry by solving construction problems on a triangular grid. > 277 tasks: from very simple to really hard > 24 subjects to explore > 66 geometric terms in a glossary > Easy to use *** About *** Pythagorea 60° is a collection of more than 270 geometric problems of different kind that can be solved without complex constructions or calculations. All objects are drawn on a grid whose cells are equilateral triangles. A lot of levels can be solved using just your geom