[cal828]

R9

$1 tri 9//3,6,11//3,4,5,6,7,10,11=$18

$1 tri 11//3,6,9//3,4,5,6,7,10,11=$18

$1 tri 6//3,9,11//3,4,5,7,9,10,11=$18

$1 tri 3,9,11//6//3,4,5,7,9,10,11=$18

$2 tri 9,11//9,11//3,4,5,6,7,10=$24

$1 tri 3,6//3,6//9,11=$4