生成该题的解答过程视频---**Problem Type:** Fill-in-the-blank question. **Question Stem:** As shown in the figure, given AB // CD. What is the relationship between angles α, β, and γ? **Chart/Diagram Description:** * **Type:** Geometric figure. * **Main Elements:** * **Points:** Five labeled points: A, B, C, D, E. * **Lines/Segments:** * A horizontal line passes through points A and B (represented by line segment AB). * Another horizontal line passes through points C and D (represented by line segment CD), positioned below the line AB. * A line segment EC connects point E to point C. * A line segment EB connects point E to point B. * **Shapes:** A triangle EBC is formed by vertices E, B, and C. Point E is positioned above the line containing AB. * **Relative Position:** The line containing AB is parallel to the line containing CD (AB // CD). * **Angles:** * Angle α is located at vertex B, formed by the line segment EB and the line segment AB (specifically, it's the angle inside the region bounded by AB and EB). * Angle β is located at vertex E, formed by the line segments EB and EC (∠BEC), which is an interior angle of triangle EBC. * Angle γ is located at vertex C, formed by the line segment EC and the line segment CD (∠ECD).