No, only in certain, limited circumstances. Eg where a quadrilateral is (can be) circumscribed within a circle.
Wouldn't think so, think of a trapezium shaped like a square with a triangle on one side... The angles at one end of the figure are both 90o, and the angles at the other end will be supplementary, but not opposite angles.
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.
no * * * * * But they can be.
No. Opposite angles are equal. Adjacent angles are supplementary.
Yes.
True
No. The adjacent angles are supplementary.
opposite angles are supplementary
false
false
No, they are equal. Adjacent angles are supplementary in a prallelogram.
Wouldn't think so, think of a trapezium shaped like a square with a triangle on one side... The angles at one end of the figure are both 90o, and the angles at the other end will be supplementary, but not opposite angles.
No, they are generally not supplementary.
Yes, adjacent angles are supplementary; however, opposite angles are not.
no * * * * * But they can be.
Yes. This is true because opposite angles are congruent and adjacent angles are supplementary.
No. Opposite angles are equal. Adjacent angles are supplementary.