CP-Geometry
Proportions in Triangles section 7.5
Corollary: If three parallel lines intersect two transversals, then they divide the transversals
proportionally.
Example: if RS = 5, ST = 7, XY = a, and YZ = 9, find the value of a.
Example 2: Find the value of x and y.
Example 3: Find the value of x in the diagram.