Diagonals of a quadrilateral ABCD bisect each other. If ÐA = 35°, determine ÐB.


Given: A = 35°

diagonals of the quadrilateral ABCD bisect each other


it is a parallelogram


A + B = 180°


35° + B = 180°


B = 180° – 35°


B = 145°


Hence, B = 145°.


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