If one angle of a triangle is equal to one angle of the other triangle and the sides including these angles are proportional, then the two triangles are similar.
True
If one angle of a triangle is equal to one angle of the other triangle and the sides including these angles are proportional, then the two triangles are similar by SAS criteria.
In the above figure, triangle ABC is similar to triangle PQR as ∠ABC is equal to ∠PQR and also the sides including these angles are in proportional (ABPQ=BCQR=21).