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find the measure of the missing angle.
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attempt 1 out of 3
a = ∘
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Question

Accepted Answer

# Explanation:
## Step1: Recall the sum of angles on a straight line
The sum of angles on a straight line is $180^{\circ}$. Here, we have a right - angle ($90^{\circ}$) and a $55^{\circ}$ angle along with angle $a$ forming a straight line.
So, $a + 55^{\circ}+90^{\circ}=180^{\circ}$
## Step2: Solve for $a$
$$
\begin{align*}
a&=180^{\circ}-(55^{\circ} + 90^{\circ})\
a&=180^{\circ}-145^{\circ}\
a&=35^{\circ}
\end{align*}
$$

# Answer:
$35$

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QUESTION IMAGE

Question

Explanation:

Step1: Recall the sum of angles on a straight line

Step2: Solve for \(a\)

Answer: