Answer: 45.58 degrees
Step-by-step explanation:

The answer is zhdhdbshsbdbdhdjdhdvfodjsksvsjskdbfndlssvsvvdsorry
(8.5*12.4)^(1/2)=10.266
In general the geometric mean is (ab)^(1/2), (abc)^(1/3), (abcd)^(1/4), etc
The nth root of the product of n elements.