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JEE Mains · Maths · STD 12 - 11. three dimension geometry

\(\triangle ABC\) के शीर्ष \(B\) तथा \(C\) रेखा \(\frac{ x +2}{3}=\frac{ y -1}{0}=\frac{ z }{4}\) पर स्थित हैं तथा \(BC =5\) इकाई है। यदि दिया है कि बिन्दु \(A (1,-1,2)\) है, तो इस त्रिभुज का क्षेत्रफल ( वर्ग इाकाइयों में) हैं

  1. A \(2\sqrt {34} \)
  2. B \(\sqrt {34} \)
  3. C \(6\)
  4. D \(5\sqrt {17} \)
Verified Solution

Answer & Solution

Correct Answer

(B) \(\sqrt {34} \)

Step-by-step Solution

Detailed explanation

Let any point on given line is \(D(3 \lambda-2,1,4 \lambda)\) Now \(A D \perp B C\) \(\mathrm{D} \mathrm{R}\) of \(BC\) \(\Rightarrow a_{1}=3, b_{1}=0, c_{1}=y\) \(D \cdot R,\) of \(A D\) \(\Rightarrow a_{2}=3 \lambda-3, b_{2}=2, c_{2}=4 \lambda-2\)…
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