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7. If PU and RS are two intersecting lines which meet ar point O. If angle POR: angle ROQ= 3:7. Find all the angles. 8. Prove that the angle formed by the bisector of interior angle A and the bisector of exterior angle B of a trian- ABC is half of angle C. 1. DOD are nraduced to noint S and I respectively If angle SPR= 35° and angle todlang4

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