Show that the `DeltaABC` with vertices A ( 0,4, 1) , B ( 2, 3, -1) and C ( 4,5,0) is right angled.

Show that the triangle ABC with vertices A(0, 4, 1), B(2, 3, -1) and C(4, 5, 0) is right angled.

Show that the triangle with vertices (3, 0), (-1, -1) and (2, 4) is isosceles and right angled.

Find the incentre of the DeltaABC with vertices A(0,0,4), B(3,0,4), C(0,4,4).

Show that the points : A (0,1,2),B(2,-1,3) and C (1,-3,1) are vertices of an isosceles right angle triangle.

Using vector method, show that the points A(1,-1,0), B(4,-3,1) and C(2,-4,5) are the vertices of a right -angled triangle.

Show that the points A=(2,-1,1),B=(1,-3,-5) and C=(3,-4,-4) are vertices of a right angled triangle (using vector method).

Show that the points (4, -3, 1), (2, -4, 5)and (1, -1, 0) form a right angled triangle.

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