Question

which angle is complementary to $angle2$?$angle1$$angle3$$angle5$$angle4$

Explanation:

Complementary angles sum to $90^\circ$. $\angle 1$ is a right angle ($90^\circ$), so $\angle 2 + \angle 3 = 90^\circ$. Thus, $\angle 3$ is complementary to $\angle 2$.

Answer:

$\angle 3$