Question Number 185239 by Shrinava last updated on 18/Jan/23
Commented by mr W last updated on 20/Jan/23
$${what}\:{is}\:{s}? \\ $$
Commented by Shrinava last updated on 22/Jan/23
$$\mathrm{Dear}\:\mathrm{professor},\:\:\boldsymbol{\mathrm{s}}−\boldsymbol{\mathrm{semiperimetr}} \\ $$
Commented by mr W last updated on 28/Jan/23
$${s}=\frac{{a}+{b}+{c}}{\mathrm{2}}\leqslant\frac{\mathrm{3}}{\mathrm{2}}{max}\left({a},{b},{c}\right) \\ $$$$\mathrm{2}{s}\leqslant\mathrm{3}\:{max}\left({a},{b},{c}\right) \\ $$$$\Rightarrow\:\mathrm{2}{Rs}\leqslant\mathrm{3}{R}\:{max}\left({a},{b},{c}\right)\:\checkmark \\ $$$$…… \\ $$