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Let ∆ABC ~ ∆DEF and their areas be, respectively, 64cm^2 and 121 cm^2, If EF = 15.4 cm., find BC.

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Let ∆ABC ~ ∆DEF and their areas be, respectively, 64cm2 and 121 cm2, If EF = 15.4 cm., find BC.

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If ∆ABC ~ ∆DEF, then

∴ BC = 8 × 1.4 

∴ BC = 11.2 cm

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