To find the measure of angle GHI, we need to subtract the measure of angle HG from the measure of angle HI.
Angle HG is given as 22 degrees on the outer scale.
Angle HI is given as 49 degrees on the outer scale.
Subtracting 22 degrees from 49 degrees gives us 27 degrees.
Therefore, the measure of angle GHI is 27 degrees.
The correct answer is: 27°