∆ABC~∆DEF and their areas are 64 cm sq. and 121 cm sq. respectively if EF=15.4 CM,then find BC
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Your answer is 11.2 cm ... I think so .....
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Answered by
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Answer:
Ar(ABC)/Ar(DEF) = 64/ 121 --------(1)
As we know that, The Ratio of Similar triangle is equal to the square of the ratio pf their side.
=> AB/EF = (X/ 15.4)^2 -------(2)
FROM EQUATION 1 AND 2.
=> 64/121 = (X/15.4)^2
=> 8/ 11= X / 15.4
=> X = 15.4 × 8/11
=> x = 11.2cm
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