True
False. If both pairs of opposite angles of a quadrilateral are congruent then the quadrilateral is a parallelogram.
False because it will have 2 equal opposite obtuse angles and 2 equal opposite acute angles with the 4 angles adding up to 360 degrees.
For the quadrilateral to be a parallelogram, both pairs of opposite angles must be congruent.
True
Supplementary (they add to 180 degrees).
No. A quadrilateral is a parallelogram when consecutiveangles are supplementary.
false
false
True
A parallelogram.
Then it's consecutive angles are supplementary.
True
False. If both pairs of opposite angles of a quadrilateral are congruent then the quadrilateral is a parallelogram.
No, they are equal. Adjacent angles are supplementary in a prallelogram.
False because it will have 2 equal opposite obtuse angles and 2 equal opposite acute angles with the 4 angles adding up to 360 degrees.
Supplementary
a and d