Consider a triangle ABC with vertex `A(2, -4)`. The internal bisectors of the angle B and C are `x+y=2` and`x- 3y = 6` respectively. Let the two bisectors meet at `I`.if (a, b) is incentre of the triangle ABC then `(a + b)` has the value equal to

Consider a triangle ABC with vertex A(2, -4) . The internal bisectors of the angle B and C are x+y=2 and x- 3y = 6 respectively. Let the two bisectors meet at I . If (x_(1), y_(1)) and (x_(2), y_(2)) are the co-ordinates of the point B and C respectively, then the value of (x_(1)x_(2)+y_(1)y_(2)) is equal to :

Consider a triangle ABC with vertex A(2, -4) . The internal bisectors of the angle B and C are x+y=2 and x- 3y = 6 respectively. Let the two bisectors meet at I . If (x_(1), y_(1)) and (x_(2), y_(2)) are the co-ordinates of the point B and C respectively, then the value of (x_(1)x_(2)+y_(1)y_(2)) is equal to :

Let A,B,C be angles of triangles with vertex A -= (4,-1) and internal angular bisectors of angles B and C be x - 1 = 0 and x - y - 1 = 0 respectively. Slope of BC is

Let A,B,C be angles of triangles with vertex A -= (4,-1) and internal angular bisectors of angles B and C be x - 1 = 0 and x - y - 1 = 0 respectively. Slope of BC is

External angle bisectors of angle B and angle c are y=x and y=-2x respectively.If the vertex A is (1,3), then co-ordinates of incentre of Delta ABC is -

ABC is a triangle in which /_A=72^(0), the internal bisectors of angles B and C meet in O. Find the magnitude of /_BOC.

ABC is a triangle in which /_A=72^(0), the internal bisectors of angles B and C meet in O.Find the magnitude of /_BOC