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ICSE Class X Math 2013 Solved Paper

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In the given figure,

∠BAD=65∘,∠ABD=70∘,∠BDC=45∘
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Question : 9
Total: 46
Find ∠ACB.
Solution:  
∠ACB=∠ADB
(Angles in the same segment of a circle)
∴‌‌∠ACB=45∘‌‌(∵∠ADB=45∘)
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