Answer: The two pairs of same-side interior angles are CHG and HGA and DHG and HGB.
mCHG = 48.81°, and m HGA = 131.19°.
mDHG = 131.19°, and m HGB = 48.81°.
mCHG + mHGA = 180°
mDHG + mHGB = 180°
Each pair of same-side interior angles is supplementary.
Explanation: