∆ABC congruent DEF their areas are resp. 64cm² and 121cm².if EF=15.4cm,find BC
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area of triangle ABC / area of triangle DEF = BC^2/EF^2
64/121 = BC^2/15.4
BC = 11.2 cm
64/121 = BC^2/15.4
BC = 11.2 cm
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