This is the "8.6: Proportions and Similar Triangles" page of the "Geometry Chapter 8" guide.
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Geometry Chapter 8   Tags: geometry, mahlman, math  

Last Updated: Feb 20, 2013 URL: http://libguides.mpsaz.net/content.php?pid=87950 Print Guide RSS Updates

8.6: Proportions and Similar Triangles Print Page
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Theorems

1. Triangle Proportionality Theorem: 

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

 

 

2. Converse of Triangle Proportionality Theorem:  

 

If , then SP II QL


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

4. If a ray bisects an angle of a triangle, then it divides the opp. side into segments whose lengths are proportional to the lengths of the other two sides.

If BD bisects ∠ ABC in Δ ABC, then 

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