Select the correct answer. which transformation will always map a parallelogram onto itself? a. a 90° rotation about its center b. a reflection across one of its diagonals c. a 180° rotation about its center d. a reflection across a line joining the midpoints of opposite sides

C. a 180° rotation about its center

Step-by-step explanation:

The question is on rotation of an object about the origin through 180°

When a point B, (h,k) is rotated about the origin 0 through 180° both clockwise and anticlockwise directions , the new position is B'(-h,-k)

Example, if we have point K (5,8) rotated through 180°, clockwise or anti-clockwise about the origin the new position will be; K'(-5,-8)

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step-by-step explanation:

hard

step-by-step explanation: