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ICSE Class X Math 2020 Paper

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Question 3
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Question : 7 of 29
Marks: +1, -0
In the figure given below, OO is, the centre of the circle and ABAB is aa diameter.
If AC=BDAC=BD and ∠AOC=72∘\angle AOC=72^{\circ}. Find:
(i) ∠ABC\angle ABC
(ii) ∠BAD\angle BAD
(iii) ∠ABD\angle ABD
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