Question

find the measure of the missing angle. answer attempt 1 out of 2 a =

Explanation:

Step1: Recall angle - sum property

The sum of angles in a right - angled situation (where one angle is 90°) is considered. The three angles shown together form a right - angle. Let the missing angle be $a$. We know that the sum of the two non - right angles in a right - angled configuration is 90°.

Step2: Set up the equation

$a + 70^{\circ}=90^{\circ}$

Step3: Solve for $a$

$a=90^{\circ}-70^{\circ}$

Answer:

$20^{\circ}$