Answer :
To prove congruence of triangles there are some postulates such as Side-Side-Side , Side-Angle-Side, Angle-Side-Angle, Angle-Angle-Side.
The Angle-Side-Angle (ASA) postulate states that if two angles and the included side of one triangle are congruent to two angles and the included side of another triangle, then the two triangles are congruent.
For two triangles to be congruent, the major elements,mainly three angles, and the three sides of a triangle should be equal to the corresponding angles and the corresponding sided of another triangle.
Therefore we need to show that two angles and one side of triangle ABC are congruent to prove the triangle ABC is congruent.
Two triangles are congruent if their corresponding sides are equal in length and their corresponding angles are equal in size. The meaning of congruence in maths is when two figures are similar to each other based on their shape and size. If two shapes are congruent, then the mirror image of one shape is the same as the other.
To know more about triangle here
https://brainly.com/question/10464126
#SPJ4