Final answer:
The correct answer is option (c) ∠EGB and ∠AGF are congruent; transitive property of equality.
Step-by-step explanation:
The correct answer is option (c) ∠EGB and ∠AGF are congruent; transitive property of equality.
According to the Vertical Angles Theorem, when two lines intersect, the pairs of vertical angles are congruent. In this case, ∠EGB and ∠AGF are vertical angles formed by the intersecting transversal EF and parallel lines AB and CD. Therefore, ∠EGB and ∠AGF are congruent.
Option (d), ∠EGB and ∠EGA are congruent; subtraction property, is incorrect because the subtraction property does not apply to the given scenario.
Learn more about Alternate Exterior Angles Theorem