Question
Solution
∆DEF ~ ∆ABC Area of ∆ABC is 9 cm2 Area of ∆DEF is 12 cm2 Side ratio of ∆ABC and ∆DEF is √∆1 / √∆2 = BC/EF = √9/12 BC : EF = 3 : 2√3 Given that 3 = 2.1 and 2√3 = 1.4√3 = 14/10 √3 = 7√3/5
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