Geometry

Question Analysis：
This question involves using the relationship between consecutive angles in a parallelograms (supplementary) and algebraic equations.
The main focus is setting up an equation based on the given angle ratio and solving for unknown angles.

Key Concept Explanation:
In a parallelogram, consecutive angles are supplementary (m∠W + m∠X = 180°), and opposite angles are congruent (m∠W = m∠Y).

Step-by-Step Solution：
Let m∠X = x. Then m∠W = 2x.
Since ∠W and ∠X are consecutive angles:
2x + x = 180° → 3x = 180° → x = 60°.
m∠W = 2(60°) = 120°.
∠Y is opposite ∠W, so m∠Y = 1...