[cal828]

R8

$1 tri 6,8//3,4,6,7,8//3,4,6,7,8=$24

R10

$4 tri 2,4//1,2,4,6//1,2,4,6=$48

$1 tri 1,2,4,6//2,4//1,2,4,6=$12

$1 tri 2//1,3,4,5//1,3,4,5=$12