how to find whether triangle are congruent
Side-Angle-Side (SAS) Rule. Side-Angle-Side is a rule used to prove whether a given set of triangles are congruent. The SAS rule states that. If two sides and the included angle of one triangle are equal to two sides and included angle of another triangle, then the triangles are congruent. An included angle is an angle formed by two given sides. Included Angle Non-included angle. For the two triangles below, if AC = PQ, BC = PR and angle C = angle P, then using the SAS rule, triangle ABC is congruent to triangle QRP.