Complementary angles are two angles whose measures add up to 90 degrees. Since we need to find the angle measure of ∠GHI, we need to know the measure of ∠LKJ.
However, since you haven't provided the measure of ∠LKJ, I can't directly calculate the measure of ∠GHI. If you know the measure of ∠LKJ, you can find ∠GHI by subtracting that measure from 90 degrees using the formula:
\[ ∠GHI = 90° - ∠LKJ \]
Could you please provide the measure of ∠LKJ?