The diagonals of a parallelogram \[ABCD\] intersect at\[O\]. If \[\angle BOC={{90}^{o}}\] and\[\angle BDC={{50}^{o}}\], find\[\angle OAB\].

The diagonals of a parallelogram \[ABCD\] intersect at\[O\]. If \[\ang

1.	The diagonals of a parallelogram \[ABCD\] intersect at\[O\]. If \[\angle BOC={{90}^{o}}\] and\[\angle BDC={{50}^{o}}\], find\[\angle OAB\].
A.	\[{{10}^{o}}\]
B.	\[{{40}^{o}}\]
C.	\[{{50}^{o}}\]
D.	\[{{90}^{o}}\]
Answer» C. \[{{50}^{o}}\]

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The diagonals of a parallelogram \[ABCD\] intersect at\[O\]. If \[\angle BOC={{90}^{o}}\] and\[\angle BDC={{50}^{o}}\], find\[\angle OAB\].

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