2.) same-side interior angles
4.) supplementary angles
Step-by-step explanation:
Same-side interior angles are formed when a transversal line intersects two or more parallel lines. In this case,Line FC can be taken as a transversal line cuting parallel lines CD and FG thus making angles ACD and GFC same side interior angles.
Consecutive angles ACD and GFC are supplementary.This means they add up to 180°.
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Properties of angles in a parallelogram :https://brainly.com/question/11611093
Keywords: describe, angle, relationship, select.
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