Q1 of 65 Page 143

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

It is given that,

Δ ABC ~ Δ DEF


Therefore,


= (2 = (2 = ()2


Given:


EF = 15.4 cm


ar (ΔABC) = 64cm2


ar (ΔDEF) = 121 cm2


Hence,


= (2


( = ()



BC = ()


BC = 8 * 1.4 = 11.2 cm


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