Answer:
If two triangles are similar or congruent, then each angle of one triangle is congruent to an angle of the other triangle. Each pair of angles, one from one triangle and the other from the other triangle, is called corresponding angles.
Vertically opposite angles can also be called vertical angles. If two lines intersect at a single point, their intersection forms 4 angles. An angle and the next angle and called adjacent angles. An angle and the angle that is not next to it are called vertical angles. Think of the letter X. Draw a big X. The top and bottom angles are vertical angles. The right and left angles are vertical angles.