Here's my step-by-step explanation:
∠KHI and ∠KHE are supplementary angles. That means their measures add up to 180°.
So if m∠KHI and m∠KHE add up to 180°, and m∠KHI = 103°, then:
m∠KHI + m∠KHE = 180°
103° + m∠KHE = 180°
m∠KHE = 180° - 103°
m∠KHE = 77°
Hope this helps, let me know if I made a mistake or if you have any questions!
