International Maths Olympiad Forum By SOF Olympiad Trainer - Page 13
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Naman from DPS BALLABGARH , Ballabgarh
Subject :IMO    Class : Class 4

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Srijoy Purkayastha from Siksha BHAVAN Montessori School , Dharmanagar
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Samarth from Central school , Chennai
Subject :IMO    Class : Class 7

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Samarth from Central school , Chennai
Class : Class 7
Angle AOD = x 2 and AOC = 2x 4. Then according to supplementary angles sum property (which is 180). Then x 2 2x 4=180 or 3x 6=180Or 3x=174 or x=58 Then AOD is x 2 or 58 2 which is 60 degrees hence option b Is correct.

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Ivaan Singh from Pathways School Gurgaon, Gurgaon
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Navya from Gyanshree, Noida
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Bhargav Bhat from Sriram Public School, Bangalore
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