6. Two circles with centre O&P intersect Each other in points C&D.Chord AB of the circle with centre O touches the circle with centre P in point E . Prove that ANGLE ADE+ANGLE BCE=180 degree.

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Q. Let the circles with centre P and Q touches each other at point A.Let the extended chord AB intersects the circle with centre P at point E and the chord BC touches the circle with centre P at the point D.
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