like we know now how to get certain answers through different processes and all that fun stuff. but when they were first coming up with it, how did they know they were doing it right?
In: Mathematics
At first, we didn’t know we were doing it right. We made some observations, like that if we knew the lengths of two sides of a triangle and the angle between them, if we made another triangle that had the same side lengths and angle, it would look like an identical twin. That was just something to learn, like “ice is cold.”
It wasn’t until later that mathematicians like Euclid were able to *prove* it, that is, to show that Side-Angle-Side is a *theorem*, not a *postulate.*
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