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30-01-2015
Mathematics

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In the pair of similar trapezoids, what is the length of side DA?

In the pair of similar trapezoids, what is the length of side DA? class=

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konrad509 konrad509

30-01-2015

\(\dfrac{|EH|}{|GH|}=\dfrac{|AD|}{|CD|}\\\\ \dfrac{15}{20}=\dfrac{|AD|}{60}\\ \dfrac{3}{4}=\dfrac{|AD|}{60}\\ 4|AD|=180\\ |AD|=45\)

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