Imagine what Pythagoras could invent with a 3D-Printer. We will never know it but we know that the progress is based on historical inventions. So what can we do today with a 3D-Printer and the Pythagoras' theorem? We all know the Pythagorean theorem (Wikipedia): a^2 + b^2 = c^2 The same is also true for: semicircle a + semicircle b = semicircle c I used this awareness to create new things like beverage coasters, flower vases, earrings.Settings for a hollow "thing": perimeters = 3 top_solid_layers = 0 bottom_solid_layers = 4 fill_density = 0.0