In fig 4,ABCD is a rectangle.its diagonals AC and BD intersect each other at O.AC is produced to E such that angle ECD is 140.find the measures of the angles of AOB
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In fig 4,ABCD is a rectangle.its diagonals AC and BD intersect each other at O.AC is produced to E such that angle ECD is 140.find the measures of the angles of AOB
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