#### Answer

Quadrant I

#### Work Step by Step

A positive angle measurement means the angle is measured from the positive x-axis going counterclockwise.
Since $2\pi \approx 6.28$ and $2.5\pi=\frac{5\pi}{2} \approx 7.85$, then$7$ radians is between $2\pi$ and $\frac{5\pi}{2}$.
$2\pi$ is the positive x-axis while $\frac{5\pi}{2}$ is the positive y-axis.
Thus, $7$ radians must be in Quadrant I.