In $\triangle A B C$, if $\mathrm{A}$ is $(1,2), \mathrm{B}$ and $\mathrm{C}$ lie on…
In $\triangle A B C$, if $\mathrm{A}$ is $(1,2), \mathrm{B}$ and $\mathrm{C}$ lie on $\mathrm{y}=\mathrm{x}+\alpha$ (where $\alpha$ is variable), then the locus of the orthocenter of the triangle is
$x+y-3=0$
$x+y+3=0$
$y=x+1$
$y=x-1$
Solution
Slope of $\mathrm{Bc} \times$ Slop of $\mathrm{AD}=-1$
$1 \times$ slope of $\mathrm{AD}=-1$