The missing Statement and reason for the transverse line angles is; m∠YXD = 60° and Supplementary angles sum up to 180°.
How to prove congruent angles?
Statement 1; AB ║ CD
Reason 1; Given
Statement 2; m∠ZYB = 60°
Reason 2; Given
Statement 3; ∠YXD and ∠DXW form a linear pair
Reason 3; Definition of Linear Pair
Statement 4; m∠YXD = 60°
Reason 4; Corresponding angles have equal measure.
Statement 5; m∠DXW = 120°
Linear pairs usually sum up to 180° because they are supplementary angles. Thus;
m∠YXD = 180° - 60° = 120°
Reason 5; Supplementary angles sum up to 180°.
Read more about Congruent Angles at; https://brainly.com/question/2938476
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