Question

answer
(a =)

Explanation:

Step1: Recall angle - sum property of a right - angle.

The sum of angles in a right - angle is 90°.

Step2: Set up the equation.

We know that \(a + 57^{\circ}=90^{\circ}\).

Step3: Solve for \(a\).

\(a=90^{\circ}- 57^{\circ}\)

Answer:

\(33^{\circ}\)