Show that the points
(-2,5),(3,-4),(7,10) form a right angled isosceles triangle.

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

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

Show that the points (0,7,10),(-1,6,6) and (-4,9,6) form a right angled isosceles triangle .

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

Show that the points A(-5,6) ,B(3,0) and C(9,8) are vertices of an isosceles right angled triangles. Find the area of this triangles.

Show that the points (7, 10), (-2, 5), and (3, -4) are the vertices of an isosceles right triangle.

Show that the points (7, 10), (-2, 5), and (3, -4) are the vertices of an isosceles right triangle.

Show that the points (7, 10), (-2, 5), and (3, -4) are the vertices of an isosceles right triangle.

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

Show that the points (2,4),(2,6) (2+sqrt3,5) form an equilateral triangle.