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JEE Mains · Maths · STD 11 - 9. straight line

एक त्रिभुज \(ABC\) में, \(A\) के निर्देशांक \((1,2)\) हैं तथा \(B\) तथा \(C\) से होकर जाने वाली माध्चिकाओं के समीकरण क्रमशः \(x + y =5\) तथा \(x =4\) हैं, तो \(\Delta ABC\) का क्षेत्रफल (वर्ग इकाइयों में) है

  1. A \(5\)
  2. B \(9\)
  3. C \(12\)
  4. D \(4\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(9\)

Step-by-step Solution

Detailed explanation

Median through \(C\) is \(x=4\) So the \(x\) coordianate of \(C\) is \(4\). let \(C \equiv \left( {4,y} \right)\) then the midpoint of \(A(1,2)\) and \(C(4,y)\) is \(D\) which lies on the median through \(B\). \(D \equiv \left( {\frac{{1 + 4}}{2},\frac{{2 + y}}{2}} \right)\)…
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