Describing Rotations -
1) Angle of rotation
2) a direction (clockwise or counterclockwise )
3) center of rotation
when solving for a rotation you may also be able to use a formula ; i prefer the formula :
90 degrees -
(A,B)------->(-B,A)
180 degrees -
(A,B)-------->(-A,-B)
270 degrees -
(A,B)-------->(B,-A)
note :
Whenever the problem does not state it is clockwise it is automatically counter clockwise , but the the formula will switch the problem for you automatically .
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