Term

Definition
If an angle of one triangle is congruent to an angle of another and the sides including those angles are in proprtion, then the triangles are similiar. 


Term

Definition
If the sides of two triangles are in proportion then the triangles are similiar. 


Term
Triangle Proportionality Theorem 

Definition
If a line parallel to one side of a triangle intersects the other two sides, then it divides those sides proportionally. 


Term
Corollary for Triangle Proportionality Theorem 

Definition
If three parallel lines intersect two transversals, then they divide the transversals proportionally. 


Term
Triangle AngleBisector Theorem 

Definition
If a ray bisects an angle of a triangle, then it divides the opposite side in to proportional segments to the other two sides. 

