Answer
$\theta\approx26.6°$
Work Step by Step
$\theta$ is an acute angle so $0°< \theta<90°$.
We know that, $\tan\theta=\frac{1}{2}$, this means that we use the inverse tangent function and a calculator in degree mode to obtain:
$\theta=\tan^{-1}(\frac{1}{2})\approx26.6°$