yes any app can and does have hiden tri's. if its showing 4 sides or more to a poly face, there are 2 or more tri's there. the triangle is the absalute simplest form of a surface as you can have. So eveyrthing geo in 3d is bilt on them. Just like 1's and 0's are the simplest form of information.

PS, good to see ya around R-Tillery