Question Number 200270 by ajfour last updated on 16/Nov/23
Commented by mr W last updated on 17/Nov/23
$${i}\:{think}\:{one}\:{vertex}\:{must}\:{lie}\:{at}\:{the} \\ $$$${center}\:{of}\:{a}\:{circle}\:{as}\:{in}\:{diagram}.\:{so} \\ $$$${s}_{{max}} ={radius}=\mathrm{1}. \\ $$
Commented by ajfour last updated on 16/Nov/23
$${Find}\:{largest}\:{s}\:{such}\:{that}\:{vertices} \\ $$$${are}\:{on}\:{the}\:{inner}\:{arcs}.\:\left({left}\:{vertex}\right. \\ $$$$\left.{may}\:{not}\:{be}\:{there}\:{as}\:{in}\:{diagram}\right) \\ $$