How many triangles can be constructed with three angles each measuring 60 degrees a) zero b)one c)more than one

If each angle is 60 you can only make one triangle.

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.