`A (5,-3), B (8, 2), C (0,0)` are the vertices of a triangle. Show that the medianfrom A is perpendicular to the side BC.

A (5, -3), B (8, 2), C (0, 0) are the vertices of a triangle. Show that the median from A is perpendicular to the side BC.

A (5, -3), B (8, 2), C (0, 0) are the vertices of a triangle. Show that the median from A is perpendicular to the side BC.

The point A(0, 0), B(1, 7), C(5, 1) are the vertices of a triangle. Find the length of the perpendicular from A to BC and hence the area of the DeltaABC .

If A(2,-1,3),B(8,5,-6) and C(4,1,0) are the vertices of a triangle,show that |vec AB|=3|vec AC|

A(2, 3, 1), B(-2, 2, 0) and C(0, 1, -1) are the vertices of the triangle ABC. Show that the triangle ABC is right -angled.

A(0,5), B(3,0) and C(3,5) are vertices of a/an . . . . . triangle.

A(6,-16,-3), B(3,-1,4), C(-2,5,0) are vertices of a triangle, Find the coordinates of the foot of the perpendicular drawn from A to bar(BC) .