No. A quadrilateral is a parallelogram when consecutiveangles are supplementary.
false
True
True
No, they are equal. Adjacent angles are supplementary in a prallelogram.
Supplementary
True
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.
Yes, a parallelogram inscribed in a circle must be a rectangle. This is because a circle's inscribed angle theorem states that the opposite angles of a cyclic quadrilateral (a quadrilateral inscribed in a circle) must be supplementary. In a parallelogram, opposite angles are equal, which can only hold true if all angles are right angles, thus making the parallelogram a rectangle.
Yes, the opposite sides of a parallelogram are equal in length, but they are not supplementary. Supplementary angles refer to two angles whose measures add up to 180 degrees. In a parallelogram, consecutive angles are supplementary, meaning each pair of adjacent angles sums to 180 degrees, while opposite angles are equal but not supplementary.