Triangle Proportionality

Sides divided by a line parallel to the third side of a triangle.

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Practice Triangle Proportionality

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Which Side is Proportional?
Teacher Contributed
$\mathrm{△}ABC$$\triangle{ABC}$ is similar to $\mathrm{△}DEF$$\triangle{DEF}$. Their sides are proportional. What is the correct value for the unknown in the following statement? $\frac{AB}{DE}$$\frac{AB}{DE}$ = $\frac{BC}{?}$$\frac{BC}{?}$ = $\frac{AC}{DF}$$\frac{AC}{DF}$
qid: 100275
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