Which representation of a transformation on a coordinate grid does not preserve congruence? A. (x, y) → (2x, 2y)
B. (x, y) → (x+6, y−2)
C. (x, y) → (−y, x)
D. (x, y) → (−x, y)

Aregular hexagon rotates counterclockwise about its center. it turns through angles greater than 0° and less than or equal to 360°. at how many different angles will the hexagon map onto itself?

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

How do you find the circumfrance of a circle?