![]() Then we subtract (a) from (c) to determine the amount of declination The Pythagrean Theorem is a² + b² = c² Let's say we're observing a 10 mile wide lake to determine its alleged convexity. We can use the Pythagrean Theorem to determine the amount of curvature variation there should allegedly be Essentially you can draw a right triangle consisting of the Earth's alleged radius (a), the distance being observed along the surface of water (b), and using the theorem to solve for (c). ![]()
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