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Diagonals of a paralle\log ram ABCD intersect at O. If \angle BOC = 90^° and \angle BDC = 40^°. Then \angle OAB is : (1) 90^° (2) 40^° (3) 60^° (4) 50^° |
| Answer» Diagonals of a paralle\log ram ABCD intersect at O. If \angle BOC = 90^° and \angle BDC = 40^°. Then \angle OAB is : (1) 90^° (2) 40^° (3) 60^° (4) 50^° | |