Answer:
Congruent angles are the angles that have equal measure. So all the angles that have equal measure will be called congruent angles. They are seen everywhere, for example, in equilateral triangles, isosceles triangles, or when a transversal intersects two parallel lines.
It is denoted by the symbol "≅", so if we want to represent ∠A is congruent to ∠X, we will write it as ∠A ≅ ∠X.