If the points `(a, 0), (b,0), (0, c)`, and `(0, d)` are concyclic `(a, b, c, d > 0)`, then prove that `ab = cd`.

If the points (2, 0), (0, 1), (4, 5)and (0, c) are concyclic, then the value of c, is

Prove that the points A(4, 0), B(6, 1), C(4, 3) and D(3, 2) are concyclic.

The distinct points A(0,0),B(0,1),C(1,0), and D(2a,3a) are concyclic than

Which of the points A(-5, 0), B(0, -3), C(3, 0), D(0,4) are closer to the origin ?

If a+b+c=1 and a>0,b>0,c>0 then prove that ab^2c^3le1/(432) .

The points (-a, -b), (0, 0), (a, b) and (a^2,ab) are (a)Collinear (b) vertices of a reotangle (c) Vertices of an parallelogram (d) None of these

Plot the points A(0,4), B(-3,0),C(0,-4),D(3,0) and name the figure ABCD

Statement 1: Points A(1,0),B(2,3),C(5,3), and D(6,0) are concyclic.Statement 2: Points A,B,C, and D form an isosceles trapezium or AB and CD meet at E. Then EA.EB=EC.ED.