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Pythagoras would have been a good rifleman, because he understood his angles. The Pythagorean Theorem states that, in a right-angled triangle, the square of the hypotenuse (“c”) is equal to the sum of the squares of the two other sides (“a” and “b”), that is, a2 + b2 = c2. The Pythagorean Theorem comes into play when shooting at an angle, i.e., uphill, or downhill, especially at distance. Here’s an interesting phenomenon: When shooting at a distant target, whether shooting uphill or downhill, absent appropriate aiming-point correction (using either an external optic or iron sights), a bullet will tend to hit high.…