<span> 3 </span>1666666667⁄<span>10000000000
</span>
(5,12,13) is a right triangle and can be constructed.
All the others do not satisfy the triangle inequality, i.e. the sum of two short sides must exceed the long side in order for the triangle to be constructed.
Examples:
2+11<15, so no
3+7<11, so no
4+8<15, so no
but 5+12>13 so yes, it can be constructed.
The one you have highlighted is correct, that is the sign for congruent.
Ratio is 10:16, so to win 50, its 50:190, so you need to play 190 games to win 50
