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[–]CompleteDoubterII[S] 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (0 children)

So this is basically a proof basic trigonometry is true (as I pointed out in the Reddit title). Honestly, I never really understood why everybody assumed/accepted this as intuitive; I found it to be a relatively huge leap in logic and counter-intuitive, so I thought up this proof myself.

One thing to note is the choice of direction. I mention lining them up vertically , but there is no reason to take this specific direction. As long as they are the same in one direction, it is fine, but I wrote up vertical to avoid becoming unnecessarily verbose.