Diagonally opposite pairs of angles will always be equal, but the only time all angles in a quadrilateral parallelogram are equal is when that shape is a rectangle.
No. A quadrilateral is a parallelogram when consecutiveangles are supplementary.
False. If both pairs of opposite angles of a quadrilateral are congruent then the quadrilateral is a parallelogram.
The angles of a parallelogram can vary but the interior angles will always add up to 360 degrees, as it is a quadrilateral.
If both pairs of opposite angles of a quadrilateral are congruent, then it is a parallelogram.
For the quadrilateral to be a parallelogram, both pairs of opposite angles must be congruent.
Then it's consecutive angles are supplementary.