Answers

2016-03-09T08:57:08+05:30
Given that 
from the diagram
BOA = 90
COA = 110
we know that in the center the angle is 360
then angle COB = 360 - 90+110
                            = 360 - 200
                            = 160
we have one property that in the above diagram
COB = 2CAB
160 = 2CAB
CAB = 160/2
CAB = 80. 
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