In the figure '/_ P=90^circ .' Sides of triangle APC are extended to 'B' and 'D'.
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a) If a circle is drawn with 'A C' as its diameter, where will be position of P with respect to that circle?
b) What about the position of 'P', if the circle is drawn with AD as diameter?
c) Prove that, the circles drawn with the sides of a qủadrilateral with perpendicular diagonals, will meet-at a common point.