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Mathematics 17 Online
OpenStudy (anonymous):

A circle has its center at the origin, and (5, -12) is a point on the circle. How long is the radius of the circle? I really need help?!?!

OpenStudy (mrnood):

This is a question about right angle triangles. Do oyu know the 'pythagoras' equation?? |dw:1409255300058:dw|

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