Find the co-ordiantes of the incentre of the triangle whose vertices are (4,1),(1,5) and (-2,1).

Find the coordinates of the orthocentre of the triangle whose vertices are (1, 2), (2, 3) and (4, 3).

Find the coordinates of the circumcenter of the triangle whose vertices are (A(5,-1),B(-1,5), and C(6,6)dot Find its radius also.

Find the co-ordinates of the circumcentre of the triangle whose vertices are : (1, 2) , (3, - 4) and (5,-6).

Find the co-ordinates of the circumcentre of the triangle whose vertices are : (-2, 2) , (2, - 1) and (4, 0).

The incentre of the triangle whose vertices are (-36, 7), (20, 7) and (0, -8) is

Find the co-ordinates of the centroid of the triangle whose vertices are (x_(1),y_(1),z_(1)), (x_(2),y_(1),z_(2)) and (x_(3),y_(3),z_(3)) .

Find the area of the triangle whose vertices are (3, 8), (– 4, 2) and (5, 1).

Find the coordinates of incentre of the triangle whose are (4, -2), (-2, 4) and (5, 5).

Find the area of the triangle whose vertices are (-2, -3), (3, 2) and (-1,-8)