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28-08-2020
Mathematics

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ΔABC ~ ΔDEF. What is the length DF?

ΔABC ΔDEF What is the length DF class=

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sarshaly sarshaly

28-08-2020

ΔABC ~ ΔDEF

that means the ratio of DF to AC = the ratio of DE to AB

[tex]x:3.5 \\6:4[/tex]

cross multiply

[tex]4x=6(3.5)\\4x=21\\x=\frac{21}{4}\\ x= 5.25[/tex]

so DF = 5.25 cm

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