Thursday, October 27, 2016

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Side Splitter Theorem

Side Splitter Theorem Definition: If a line is parallel to a side of a triangle and intersects the other two sides, then this line divides those two sides proportionally.

Source #1: http://mathbitsnotebook.com/Geometry/Similarity/SMSplitter.html

Source #2: http://www.dummies.com/education/math/geometry/how-to-solve-similar-triangle-problems-with-the-side-...

Proportions

How to Solve a Proportion - 12:2=42:7 (AKA) 12 is to 2 as 42 is to 7

Why is this a proportion? Because 12 is six times 2, just as 42 is six times 7.

Source: http://www.themathpage.com/atrig/ratio-and-proportion.htm#proportion