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Given: A chord of a circle is equal to the radius of the circle i.e. OA=OB.
To find: ADB and
ACB.
Solution :
In
OAB,
OA = AB (Given )
OA = OB (Radii of circle)
So, OA=OB=AB
So,
AOB = 
ACBD is a cyclic quadrilateral .
So,
ACB+
ADB =