The adjoining figure shows
a pentagon, inscribed in a
circle with centre O. Given
AB = BC = CD and
ABC = 132º, find:
(i) AEB
(ii) AED
(iii) COD.
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In the figure, O is the centre of circle,
with AB = BC = CD.
Also, ∠ABC = 132°
In cyclic quadrilateral,
ABCE ∠ABC + ∠AEC = 180° [sum of opposite angles]
→ ∠132 + ∠AEC = 180°
→ ∠AEC = 180° -132°
→ ∠AEC = 48°
Since, AB = BC, ∠AEB = ∠BEC [equal chords subtends equal angles]
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