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Mathematics 9 Online
OpenStudy (anonymous):

The image of a point after a –90° rotation about the origin is (–4, 7). What are the coordinates of the preimage?

Miracrown (miracrown):

|dw:1418596298013:dw|

Miracrown (miracrown):

So after we rotate a point -90 degrees...it ends up at -4(7) so that's up there basically right?

Miracrown (miracrown):

What are your thoughts on this? where would the original point be if this is the result of a -90 degree rotation?

Miracrown (miracrown):

Think about a rotation of 90 degrees being the same thing as a reflection

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