If quadrilateral abcd rotates 90° counterclockwise about the origin, what are the coordinates of a′ in quadrilateral a′b′c′d′ ? a.) (2, 1) b.) (-2, -1) c.) (-2, -2) d.) (-2, 0)

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.

Do 12/14 and 8/10 have the same value? explain your answer.

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