Most general triangle: 3 non-zero angles 3 non-zero edges Sum of angles: 180 degrees Isosceles triangle
Invariant of general triangle
2 edges of equal length
Equilateral triangle:
Invariant of isosceles triangle
3 edges of equal length
Right triangle:
Invariant of general triangle
Pythagoras
Isosceles right triangle:
Invariant of isosceles triangle
Invariant of right triangle
