Answer
$21.3^\circ$
Work Step by Step
From given triangle-
$\tan\theta$ = $\frac{7}{18}$
Therefore-
$\theta$ = $\tan^{-1} (\frac{7}{18})$
Using calculator in degree mode-
$\tan^{-1}$ → $7\div18$ = 21.2505055071
i.e. $\theta$ = $\tan^{-1}(\frac{7}{18}) \approx 21.3^\circ$
(Rounded to one decimal place)
