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In Fig.2, a quadrilateral ABCD is drawn to circumscribe a circle, with centre O, in such away that the sides AB, BC, CD and DA touch the circle at the points P, Q, R and Srespectively. Prove that AB + CD = BC + DA.
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| Question Text | In Fig.2, a quadrilateral ABCD is drawn to circumscribe a circle, with centre O, in such away that the sides AB, BC, CD and DA touch the circle at the points P, Q, R and Srespectively. Prove that AB + CD = BC + DA. |
