Can someone (please) help me answer G and B ? picture below v

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.

What is the length of the segment joining the points at (4,5) and (6,-2) round to the nearest tenth if necessary

Given that ot =5, xt=12, and ox= 13 is xy tangent to circle o at t? explain.