Question

find the measure of the missing angle. answer

Explanation:

Step1: Recall angle - sum property

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

Step2: Set up the equation

Let the missing angle be $\alpha$. We know that $70^{\circ}+\alpha = 90^{\circ}$.

Step3: Solve for the missing angle

$\alpha=90^{\circ}-70^{\circ}$.

Answer:

$20^{\circ}$