Pythagoras, Pythagorean, Euclidean, Gravitational Lensing, Symmetry.
square, and the square is critical to write down the equations which lead us to c² = a² + b². Therefore, our next question should be: Why α + β = 90°, or why do the internal angles of any triangle add to 180 degrees? We have reached the problem’s kernel now, as the triangle internal angles sum has