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    Which IIM Will Conduct CAT 2026?

    CAT Some Important Results - Practice Questions & MCQ

    Edited By admin | Updated on Oct 04, 2023 04:20 PM | #CAT

    Quick Facts

    • 2 Questions around this concept.

    Solve by difficulty

    In ABC, if $\angle$B = 90° and D is the midpoint of BC, then AC2 = AD2 + 3CD2. (True/False)

    Concepts Covered - 1

    Some Important Results

    Some Important Results

    1. If ∆ABC is a right angle triangle with right-angled at B such that BD ⊥AC, DM ⊥ BC, and DN ⊥ AB.

              

      Then,

    1. DM2 = DN · MC
    2. DN2 = DM · AN

     

    2. If ABC is a triangle in which ∠ ABC < 90° and AD ⊥ BC. Then, AC2 = AB2 + BC2 – 2 BC · BD.

       

    3. If AD is a median of a triangle ABC and AM ⊥ BC.

       

      Then,

        \\\text { (i) } \mathrm{AC}^{2}=\mathrm{AD}^{2}+\mathrm{BC} \cdot \mathrm{DM}+\left(\frac{\mathrm{BC}}{2}\right)^{2}\\\text { (ii) } \mathrm{AB}^{2}=\mathrm{AD}^{2}-\mathrm{BC} \cdot \mathrm{DM}+\left(\frac{\mathrm{BC}}{2}\right)^{2}\\\text { (iii) } \mathrm{AC}^{2}+\mathrm{AB}^{2}=2 \mathrm{AD}^{2}+\frac{1}{2} \mathrm{BC}^{2}

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