Multiple Choice Questions on In a equilateral triangle ABC if AD perp BC then ........ for Mathematics - All Exams Preparation

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Multiple Choice Questions

In a equilateral triangle ABC if AD perp BC then ........

Quantitative Aptitude ( CCS) Geometry
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    In a equilateral triangle ABC, if AD ⊥ BC, then :

    2 AB2 = 3 AD2

    Incorrect Answer

    4 AB2 = 3 AD2

    Incorrect Answer

    3 AB2 = 4 AD2

    Correct Answer

    3 AB2 = 2 AD2

    Incorrect Answer
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    Explanation:


    AB2 = BD2 + AD2
    ⇒ AB2 = (1/2AB)2 = + AD2
    ∴ 4 AB2 = AB2 + 4 AD2
    ⇒ 3 AB2 = 4 AD2

    By: Amit Kumar
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