Sunday, February 19, 2012

Ho do we solve Rotations?

Rotations are pretty easy. Hey, it's me back at you with fun mathy excitement.
A rotation is when you flip an image either 90, 180, or 270 degrees around the grid depending where it originally was and where it is going. Now t gets confusing because the numbers of the coordinates flip and change and it all depends where it started out at. Rotations will always go counterclockwise, meaning the opposite way a clock normally ticks. For those of you who no longer remember what an analog clock looks like, that means that it will always go to the right unless specified in the question. 
There's an easy way to remember what goes where for each rotation. 
90 degrees.......(x,y)--->(-y,x)
180 degrees......(x,y)--->(-x,-y)
270 degrees....(x,y)--->(y,-x) 


Now this rule will change and become the reverse if you are going counterclockwise. 


And those are the rules to the rotation. I am pretty sure you know how to graph this right? I hope so. 

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