triangle, if I know side-angle-side
triangle, if I know side-side-side (example)
triangle, if I know angle-side-angle
triangle, if I know angle-angle-side: | ↑ [angle3 = 180°−(angle1+angle2)] |  |
triangle, if I know angle-side-side
In Italy many textbooks consider only the first three cases, which they call, instead of "lato-angolo-lato", "lato-lato-lato", "angolo-lato-angolo", "1°, 3°, 2° criterio di eguaglianza" (!)