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pratham garg from delhi public school, chandigarh
Subject :IMO    Class : Class 9

Diagonals of a rectangle ABCD intersect at O. If ∠AOB = 70° , then ∠DCO is ______.

(A) 70°

(B) 110°

(C) 35°

(D) 55°

Ans 1:

Debdiptta D Majumder from Calcutta boys school , Kolkata
Class : Class 10
the answer should be 55

Ans 2:

Nishant kumar jha from Rps, Dbg
Class : Class 10
55

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