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OpenStudy (anonymous):
Triangles ABC and DEF are similar. What is the length of DE? A. 15 cm B. 21 cm C. 24 cm D. 27 cm
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OpenStudy (ccswims):
First: What is 18/6
OpenStudy (anonymous):
3
OpenStudy (ccswims):
ok, so if they are similar we can infer that all sides are exactly 3 apart
OpenStudy (ccswims):
so do 9*3 and that will be Triangle DE's length
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