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You don't even have to rotate the triangle... just rotate the point P.

y coordinate is also the same..

so you would basically switch the x points to y points?

|dw:1349722508665:dw|

no, you can't swap coordinates if you only rotate 45 degrees.

|dw:1349722859375:dw|

were taught to use use matrices to solve the problem {0 -1}
{1 0}

interesting. Is a 45 degree rotation something you can express as matrix transformation?

yes its a matrix rotation

its weird how my online class is doing it

Does knowing the answer help you figure out how to set up the matrix rotation, working backward?

or (-0.71, 0.71) to the nearest hundredth.

thanks you

hope it helps :) good luck!

ur cute