"In ` A B C`  , the coordinates of the vertex `A`  are `(4,-1)`  , and lines `x-y-1=0`  and `2x-y=3`
Channel: Doubtnut
Date: 2020-06-28

"In ` A B C`
 
 , the coordinates of the vertex `A`
 
 are `(4,-1)`
 
 , and lines `x-y-1=0`
 
 and `2x-y=3`
 
 are the internal bisectors of angles `Ba n dC`
 
 . Then, the radius of the incircle of triangle `A B C`
 
 is
 
 (a)`4/(sqrt(5))`
 
  (b) `3/(sqrt(5))`
 
  (c) `6/(sqrt(5))`
 
  (d) `7/(sqrt(5))`"