Pythagorea 60° Degrees: Geometry on Triangular Grid by HORIS INTERNATIONAL LIMITED.
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 geometric intuition or by finding natural laws, regularity, and symmetry.
There are no sophisticated instruments and moves are not counted. You can construct straight lines and segments only and set points in line intersections. It looks very easy but it is enough to provide an infinite number of interesting problems and unexpected challenges.

Pythagorea 60° Degrees: Geometry on Triangular Grid Solutions
 Pythagorea 60° Degrees Level 1.1 Solution
 Pythagorea 60° Degrees Level 1.2 Solution
 Pythagorea 60° Degrees Level 1.3 Solution
 Pythagorea 60° Degrees Level 1.4 Solution
 Pythagorea 60° Degrees Level 1.5 Solution
 Pythagorea 60° Degrees Level 1.6 Solution
 Pythagorea 60° Degrees Level 1.7 Solution
 Pythagorea 60° Degrees Level 1.8 Solution
 Pythagorea 60° Degrees Level 1.9 Solution
 Pythagorea 60° Degrees Level 1.10 Solution
 Pythagorea 60° Degrees Level 1.11 Solution
 Pythagorea 60° Degrees Level 1.12 Solution
 Pythagorea 60° Degrees Level 1.13 Solution
 Pythagorea 60° Degrees Level 1.14 Solution
 Pythagorea 60° Degrees Level 1.15 Solution
 Pythagorea 60° Degrees Level 2.1 Solution
 Pythagorea 60° Degrees Level 2.2 Solution
 Pythagorea 60° Degrees Level 2.3 Solution
 Pythagorea 60° Degrees Level 2.4 Solution
 Pythagorea 60° Degrees Level 2.5 Solution
 Pythagorea 60° Degrees Level 2.6 Solution
 Pythagorea 60° Degrees Level 2.7 Solution
 Pythagorea 60° Degrees Level 2.8 Solution
 Pythagorea 60° Degrees Level 2.9 Solution
 Pythagorea 60° Degrees Level 2.10 Solution
 Pythagorea 60° Degrees Level 2.11 Solution
 Pythagorea 60° Degrees Level 2.12 Solution
 Pythagorea 60° Degrees Level 3.1 Solution
 Pythagorea 60° Degrees Level 3.2 Solution
 Pythagorea 60° Degrees Level 3.3 Solution