[教養数学]素朴な疑問！三角形の内角の和が180度になるのはなぜ？［雑学］
Synopsis
今回は大人のための学び直し数学です。 三角形の内角の和が180度になる理由について考えてみましょう！ #数学 #学び直し #教養 ...
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