The supplementary interior angles are ∠G and ∠F
How to find the Supplementary interior angles?
Supplementary interior angles are also called same side interior angles which are a pair of angles that are located on the interior of (or inside) between two parallel lines that are cut by a transversal.
When a transversal intersects two parallel lines, each pair of same-side interior angles are supplementary, meaning that their sum is 180 degrees.
From the given diagram, the supplementary interior angles are ∠G and ∠F