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Line l is the bisector of an angle angle...

Line l is the bisector of an angle `angle A` and B is any point on l. BP and BQ are perpendiculars from B to the arms of `angle A` (see Fig. 7.20). Show that: (i) `triangle APB cong triangle AQB` (ii) BP = BQ or B is equidistant from the arms of `angle A`.

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