what is the measure of the missing angle

Answer:
33
Step-by-step explanation:
What you do is you take 57 and since it is a right triangle you take 90 and add them together. You will get 147. You will then minus this from 180 to get 33.
Answer:
The measure of the missing angle is 33 degrees.
Step-by-step explanation:
The sum of all angles of any triangle is 180 degrees. This triangle has a right angle, which equals 90 degrees. Add 57 with 90 to get 147.
180 - 147 = 33
To prove this:
147 + 33 = 180
I hope this helped! :-)