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

Question

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

jhonyy9 · Answer

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look this image and imagine now these choices step by step how you think what will be ,what can be right sure ?