Determine whether each quadrilateral is a parallelogram. Justify your answer. a Yes; opposite angles are congruent. b Yes, opposite sides are parallel and congruent. c Yes; consecutive angles are supplementary. d No; none of the tests for parallelograms are fulfilled..

A parallelogram is a quadrilateral with congruent and parallel opposite sides. Thus, to justify that the given quadrilateral is a parallelogram, option C is correct.

i.e C. Yes; consecutive angles are supplementary.

Quadrilaterals are shape with four straight sides. Examples are; square, rectangle, parallelogram, trapezium etc.

A parallelogram is a type of quadrilateral that has opposite sides to be equal and parallel. It has some distinguishing properties which can be used to differentiate it from other quadrilaterals. Some of the are:

Thus, in the given question the required option is C. consecutive angles are supplementary.

For more on properties parallelogram, check: link

i think the answer would be c