Question

find the measure of the missing angle.
answer attempt 1 out of 2
a = \\(\square\\) \\(^\circ\\)
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Explanation:

Step1: Recognize total angle is 90°

The three angles form a right angle ($90^\circ$), so:
$$a + 42^\circ + 90^\circ = 180^\circ$$

Step2: Solve for $a$

Rearrange to isolate $a$:
$$a = 180^\circ - 90^\circ - 42^\circ$$
$$a = 48^\circ$$

Answer:

$48$