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OpenStudy (anonymous):

ΔABC is similar to ΔDEF. The ratio of the perimeter of ΔABC to the perimeter of ΔDEF is 1 : 10. If the longest side of ΔDEF measures 40 units, what is the length of the longest side of ΔABC ?

OpenStudy (anonymous):

A. 2 units B. 4 units C. 16 units D. 30 units

OpenStudy (anonymous):

|dw:1406801669807:dw| you just have to cross multiply

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