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## helpme9283 3 years ago 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? 5?

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1. lgbasallote

doesnt sound right..

2. lgbasallote

use the distance formula $\huge \sqrt{(x_2-x_1)^2 + (y_2 - y_1)^2}$

3. helpme9283

12?

4. lgbasallote

your two points are (0,0) <--center and (5,-12) <--endpoint of radius

5. katiebugg

wouldnt u just messure the distance from the orgin to the point on the circle

6. lgbasallote

@helpme9283 try solving...then guess :p haha

7. helpme9283

13.

8. lgbasallote

right

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