In parallelogram ABCD, the angle is BAD = 40 degrees. Determine the rest of the corners.

In a parallelogram, opposite angles are equal, then the angle BAD = BCD = 40.

The sum of the adjacent angles of a parallelogram is 180.

Angle BAD + ABC = 180.

Then the angle ABC = ADC = 180 – ABD = 180 – 40 = 140.

Answer: The angles of the parallelogram are 40 and 140.



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