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180 which is answer D
JeanaShupp

Answer:- D is the right answer . A rectangle is always mapped onto itself if it is rotated 180°.


Explanation:-

  • A shape has rotational symmetry if it maps onto itself under rotation at its center about  a point .
  • The order of rotational symmetry is the total number of times the figure maps onto itself during a rotation of 360°.

A rectangle has an order of symmetry =2

Thus a rectangle is always mapped onto itself if it is rotated [tex]\frac{360^{\circ}}{2}=180^{\circ}[/tex].

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