7. Find the supplementary angle to an angle that is $$ 128.9^{\circ} $$. Explain your answer.

Question

UpStudy AI · Accepted Answer

Let the supplementary angle be $$ x $$. By definition, supplementary angles add up to $$ 180^{\circ} $$. Therefore, we have:

$$
x + 128.9^{\circ} = 180^{\circ}
$$

Subtract $$ 128.9^{\circ} $$ from both sides:

$$
x = 180^{\circ} - 128.9^{\circ}
$$

Calculating the difference:

$$
x = 51.1^{\circ}
$$

Thus, the supplementary angle to $$ 128.9^{\circ} $$ is $$ 51.1^{\circ} $$.
The supplementary angle to $$ 128.9^{\circ} $$ is $$ 51.1^{\circ} $$.

7. Find the supplementary angle to an angle that is \( 128.9^{\circ} \). Explain your answer.