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OpenStudy (anonymous):
∆ABC is similar to ∆DEF. The ratio of the perimeter of ∆ABC to the perimeter of ∆DEF is 1 : 10. The longest side of ∆DEF measures 40 units.
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OpenStudy (anonymous):
I would like to know if this is right.
OpenStudy (abdullahm):
Correct! :D
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