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Mathematics 15 Online
OpenStudy (anonymous):

Find the coordinates of the image of point R(–1, 3) rotated 90° about the origin.

hero (hero):

If no one else posts a solution, I will. Give me a minute.

OpenStudy (anonymous):

k thanks

hero (hero):

Okay, so we have to find the coordinates of S, such that ROS forms a right triangle: |dw:1334764356084:dw|

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