Question

The distance of the point $P(2, -2)$ from the origin is:

Accepted Answer

D. Distance from origin $(0,0)$ to $(x,y)$ is $\sqrt{x^2 + y^2}$. $$OP = \sqrt{2^2 + (-2)^2} = \sqrt{4 + 4} = \sqrt{8} = 2\sqrt{2}$$

Distance of a point from the origin

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