The Triangle Proportionality Theorem

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State and apply the theorem that a line parallel to one side of a triangle divides the other two sides proportionally.

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7 lessons

Goal

Set up proportions to solve problems with similar triangles, and prove and apply the Triangle Proportionality Theorem and its converse.

7 lessons

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prove theorems about similar triangles, including the Triangle Proportionality theorem, and apply these theorems to solve problems; and

create and use representations to organize, record, and communicate mathematical ideas;