Hallo everyone,↵
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Do you know any simple formulas that are often unknown to many? For me, some can be mentioned are Euler characteristic, 2-Ear Theorem, Pigeonhole, Fermat, Handshaking theorem, incenter formula of a triangle, harmonic series sum, pick theorem, Shoelace Formula... And what about you? Can you share some?↵
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Thank you.
↵
Do you know any simple formulas that are often unknown to many? For me, some can be mentioned are Euler characteristic, 2-Ear Theorem, Pigeonhole, Fermat, Handshaking theorem, incenter formula of a triangle, harmonic series sum, pick theorem, Shoelace Formula... And what about you? Can you share some?↵
↵
Thank you.