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Question


In the above figure where O is the center of the circle, AB=CD and AOB=30. Then, AED = and COD = .

A
90°
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B
50°
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C
40°
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D
30°
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Solution

The correct option is D 30°
Given that AB=CD. We know that equal chords subtend equal angles at the centre.
AOB=COD=30
Also, we know that angle in a semicircle is a right angle.
AED=90
AED=90and COD=30

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