TS EAMCET · Maths · Properties of Triangles
\(A(3,2,-1), B(4,1,0), C(2,1,4)\) are the vertices of a triangle \(A B C\). If the bisector of \(\angle B A C\) intersects the side \(B C\) at \(D(p, q, r)\) then \(\sqrt{2 p+q+r}=\)
- A 1
- B 2
- C 3
- D 4
Answer & Solution
Correct Answer
(C) 3
Step-by-step Solution
Detailed explanation
\(A B=\sqrt{(1)^2+(-1)^2+(1)^2}=\sqrt{3}\) \(A C=\sqrt{(-1)^2+(-1)^2+(5)^2}=\sqrt{27}=3 \sqrt{3}\) \(A D\) is the internal bisector of \(\angle B A C\)…
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