Enter the equation of the circle with the given center and radius. center: (0,6) radius:7

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.

Answer this question only if you know the answer! 30 points and

Could somebody me with this radical simplification?