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In an equilateral triangle `A B C ,` if `A D_|_B C` , then (a) `2\ A B^2=3\ A D^2` (b) `4\ A B^2=3\ A D^2` (c) `3\ A B^2=4\ A D^2` (d) `3\ A B^2=2\ A D^2`

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RD SHARMA ENGLISH-TRIANGLES-All Questions
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  13. If in A B C and D E F , (A B)/(D E)=(B C)/(F D) , then A B C ~ D E...

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