Using the proportion of parallel lines to determine the missing length of a triangle

Learn how to solve for the unknown in a triangle divided internally such that the division is parallel to one of the sides of the triangle. The triangle proportionality theorem states that if a line is parallel to one side of a triangle and it intersects the other two sides, then it divides those sides proportionally. Thus, with the aid of the triangle propotionality theorem, we can solve for the unknown in a triangle divided proportionally.
#geometry #similartriangles

how to determine,how to find,missing side,missing,side,length,missing lengh,proportion,sides,triangle,definition,solve,solution,similarity,similar,how to,math help,median,midpoint,parallel,determine the missing length of a triangle,proportion of parallel lines,proportion of parallel lines to determine the missing length of a triangle,how to find the missing length of a triangle,free math videos,brian mclogan,missing length of a triangle,missing length,parallel lines,