Hi! Could you explain this question? I’m not sure what these symbols mean, nor how to solve.

Which statement is not always true for a parallelogram? (a) opposite sides are congruent. (b) diagonals bisect each other. (c) it has 4 congruent angles. (d) consecutive angles are supplementary.

Asquare parking lot has 6,400 square meters what is the length in meters

Rectangle pqrs has length a and width 4b. the x-axis bisects ps and qr what are the coordinates of the vertices