Homework Help: math

Posted by Kory on Wednesday, November 16, 2011 at 5:33pm.

What is the rule for finding coordinates after a 90 degree rotation?

after a 180 degree rotation? after a 270 degree rotation?

math - Henry, Friday, November 18, 2011 at 4:11pm
Assume a circle with a radius of i(r=1)

@ 0 Degrees: = 1, and Y = 0.

@ 90 Degrees: X = 0, and Y = 1.

@ 180 Degrees: X = -1, and Y = 0.

@ 270 Degrees: X = 0, and Y = -1.

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