Therefore, the sum of any two adjacent angles of a parallelogram is equal to 180°. Hence, it is proved that any two adjacent or consecutive angles of a parallelogram are supplementary.

What is sum of all angles of parallelogram?

There are four interior angles in a parallelogram and the sum of the interior angles of a parallelogram is always 360°.

Do parallelograms add up to 180?

Explanation: Parallelograms have angles totalling 360 degrees, but also have matching pairs of angles at the ends of diagonals.