Rotating polygon counterclockwise

Algebra
Tutor: None Selected Time limit: 1 Day

If polygon ABCD rotates 90° counterclockwise about the origin to create polygon ABC′D′, what are the coordinates of point B′ ?

Oct 13th, 2014

If the coordinates of point B are (a,b),

then the coordinates of point B' after rotating are (-b,a).

Oct 13th, 2014

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Oct 13th, 2014
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Oct 13th, 2014
Mar 29th, 2017
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