F3 Math Question?

Please help with this simple question:

https://www.sendspace.com/file/wy7d2d

1 個解答

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  • 2 年 前
    最佳解答

    draw a line DG parallels to BE and intersect AC on G point

    , so DG=BE/2, DG:EF=3:2 ---> EF=(2/3)DG ---> EF=BE/3

    the same rule applies, DF=AD/3

    triangle ABE=triangle ABD = triangle ABC /2

    so triangle AEF = triangle BDF = triangle ABC /6 ......Ans: (A)

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