Without using pythogoras theorem,show that A(4,4),B(3,5) and C(-1,1) are the vertices of a right angled triangle.

Show that the points A(-1, 1), B(2, -2) and C(8, 4) are the vertices of a right angled triangle.

Prove that the points A(7,10), B(-2,5) and C(3,-4) are the vertices of an isosceles right angled triangle.

Let A(4,2),B(6,5) and C(1,4) be the vertices of triangleABC .(iv)What do you observe?

Show that the points A(-1, 1), B(3, 5) and C(-2, 6) form an isosceles triangle.

Prove that the triangle whose vertices are (-2, 2) (1, -2) and (9, 4) is a right angled triangle.

Prove that the following points are the vertices of an isosceles right angled triangle. (0, 4), (4, 1), (7, 5)

Prove that the following points are the vertices of an isosceles right angled triangle. (3, 0), (6, 4), (-1, 3)

Prove that the following points are the vertices of an isosceles right angled triangle. (3, 1), (9, 7), (-3, 7)

Using concept of slopes, show that the points (-2, 4), (1, 1) and (3, -1) are collinear.

The length of the sides of a triangle are a+b , ab-1 and sqrt((a^2+1)(b^2+1)) . Show that it is a right angled triangle.