Answer:
The angle in degree is equal to [tex]80.5\°[/tex]
Step-by-step explanation:
see the attached figure to better understand the problem
In the right triangle ABC
[tex]tan(A)=\frac{BC}{AB}[/tex]
substitute the values
[tex]tan(A)=\frac{324}{54}[/tex]
[tex]A=arctan(\frac{324}{54})=80.5\°[/tex]