Answer: m∠AXY = 57°
Explanation:
∠AXY and ∠FYD are supplementary angles. We know this because ∠AXY and ∠CYF are corresponding angles (which are congruent), making ∠AXY and ∠FYD supplementary. We can use this information to solve.
m∠AXY = 180° - 123°
m∠AXY = 57°