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Questions  >>  Olympiad-Math  >>  Class 10
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Q)

If $\Delta ABC \approx \Delta EDF \;and\; \Delta ABC$ not similar to $\Delta DEF$ then which of the following is not true?

$\begin{array}{1 1} BC . DE = AB .EF.\\ BC .EF = AC .FD. \\ AB .EF = AC . DE. \\ BC . DE = AB .FD. \end{array} $

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A)
Solution :
If $\Delta ABC \approx \Delta EDF$ and $\Delta ABC \approx \Delta EDF$ and $\Delta ABC $ is not similar to $\Delta DEF$ ,then $BC. DE = AB .EF⇒BCEF= \large\frac{AB}{DE} =\frac{BC}{EF}$ Here according to given condition,
$ BC. DE \neq AB .EF$
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