∆ABC~∆DEF . If A(∆ABC) :A(∆DEF) =16:25.BC=2.2cm then find EF
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Answer:
2.75 cm
Step-by-step explanation:
area of ∆ABC/ area of DEF= ( BC/ EF) ²
16/25= (2.2)²/EF²
EF²= 4.84*25/16
EF²= 121/16
EF=√121/16
EF= 11/4 = 2.75cm
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