mathophilia
A cool math channel with elegant mathematical proofs and explanations!
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Splitting Masses: Why It Works
Amazing Reflective Property of Ellipses: a Geometric Proof
Complex Numbers for Heron's Formula
Mass Points Explained
My ORIGINAL way to SOLVE QUADRATICS
Proving the AM-GM Inequality with ZERO Calculus
Avoiding Stupid Mistakes In Math
Heron's Formula, but Proven Elegantly