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  • <math>s = \frac {a+b+c}{2}</math> is semiperimeter, <math>2S </math> is twice the area of <math>\tri ...c)}{s},</math> where <math>r</math> is the inradius, <math>R = \frac {abc}{2 \cdot 2S}</math> is the circumradius,
    34 KB (6,879 words) - 16:36, 2 February 2025