Solve 29sum 3 bit

​Q29.(i) Show that the points A(5, 6), B (1, 5) , C(2, 1) and D(6, 2) are the vertices of a square.

        (ii) Prove that the points A (2, 3), B (–2, 2), C (–1, –2), and D (3, –1) are the vertices of a square ABCD.

        (iii) Name the type of triangle PQR formed by the points P ( $\sqrt{2}$ ,$\sqrt{2}$), Q (–$\sqrt{2}$, –$\sqrt{2}$) and R (– $\sqrt{6}$,$\sqrt{6}$)