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Mathematics 9 Online
OpenStudy (anonymous):

What fraction does a 90 degree turn equal? HELP PLZ

OpenStudy (bee_see):

pi/2

OpenStudy (bee_see):

http://upload.wikimedia.org/wikipedia/commons/4/4c/Unit_circle_angles_color.svg 90 degrees is at point (0,1) and it's pi/2 in radians.

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