Question

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

Explanation:

Step1: Recall angle - addition property

The two angles are adjacent and form a right - angle (implied by context). The sum of adjacent complementary angles is 90°.

Step2: Calculate the missing angle

Let the missing angle be \(d\). We know that \(d + 21^{\circ}=90^{\circ}\), so \(d=90^{\circ}-21^{\circ}\).

Answer:

\(69^{\circ}\)