2 answers:
Answer:
39 degrees
Step-by-step explanation:
It is shown that there is a 90 degree angle one part is given so 90-51=39 degrees.
Answer:
b = 39°
Step-by-step explanation:
The box means that it is a right angle and a right angle means it is 90 degrees.
90 degrees - 51 degrees = 39 degrees
b = 39°
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