I and O are respectively the in-centre and circumcentre of a triangle – McqOptions

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1.	I and O are respectively the in-centre and circumcentre of a triangle ABC. The line AI produced intersects the circumcircle of ABC at the point D. If ABC = x , BID = y and BOD = z , then z + x = y
A.	3
B.	1
C.	2
D.	4
Answer» B. 1

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