The formula S= (n-2) 180 gives the sum of the measures of the angles of n-sided
polygon where n is the input and S is the output.
1. Solve the formula for n so that S becomes the input and n becomes the output.
2. Write the formula in (a) as the inverse function of f(x) = (x-2) 180.
3. Verify is the two functions are inverse functions.
4. Determine the domain and range of the function and its inverse.