Explanation:
I do not see your diagram. Triangles can be isosceles, scalene, equilateral, degenerate, etc.
Isosceles; 2 congruent sides and angles
Scalene: no congruent sides and angles
Equilateral: 3 congruent sides and angles
Degenerate: The sum of two sides is equal to the length of the other one, looks like a line segment.