TʜᴇSASSimilarity Theorem states that if two sides in one triangle are proportional to two sides in another triangle and the included angle in both are congruent, then the two triangles are similar.
Step-by-step explanation:
Euclidean geometry
The fundamental theorem of similaritystates that a line segment splits two sides of a triangle into proportional segments if and only if the segment is parallel to the triangle's third side.