Pythagoras, Pythagorean, Euclidean, Gravitational Lensing, Symmetry.
free 90 degrees angle, with α < β < 90°. It has also 3 sides; a, b, and c, with lengths c > b > a. Pythagorean Theorem is made by a humble equation: Figure 2: Pythagorean Theorem expresses the relationship among the side lengths in a right triangle. Those lengths can be measured in any unit you