The question and answer choices are listed in the picture.

Given:


Solution:
If we want to find the solution for r, we need to move the r to the left side first. So I reverse the side


Move 2π to the right side. Because on the left side 2π acts as numerator, after it's moved to the right side, it becomes denominator.



Move 360 to the right side. Because on the left side 360 acts as denominator, after it's moved to the right side, it becomes numerator.



Move x to the right side. Because on the left side x acts as numerator, after it's moved to the right side, it becomes denominator.



Then simplify the fraction



The answer is second option