According to Platos idea of the universe, that is based on mathematic relations, the beauty of geometrical forms is fundamental. In Plato's Timaios we read that each one of the univers' fundamental elements i.e. air, fire, water and earth, are constituted from tiny regular polyhedrons build from certain geometrical forms (like the cube from the square). In conclusion, all things in nature are formed on basic geometrical forms.
Two of the most beautiful forms, pointed out by Plato, are those rectangular triangles with corners of 90°, 45°, 45° and 90°, 60°, 30° degrees – they are fundamental for his cosmology. The most headlands, as seen on numerous Greek beaches, end in on of the above two forms, creating a severe and common but nevertheless beautiful and harmonious landscape.