math-public:ploschad_treugolnika_s_plohimi_storonami
$$S = \dfrac{1}{4}\sqrt{4a^2b^2-(a^2+b^2-c^2)^2}$$ $$S = \dfrac{1}{4}\sqrt{2a^2b^2+2b^2c^2+2a^2c^2-(a^4+b^4+c^4)}$$
math-public/ploschad_treugolnika_s_plohimi_storonami.txt · Последнее изменение: 2019/11/19 19:15 — labreslav