讲解一下图片中的题目---**Problem 1** **Question Stem:** 如图在△ABC 中，∠BAC=100°, AD⊥BC 于 D, AE 平分∠BAC, ∠B=40°, 则∠DAE=多少度 **Chart Description:** Type: Geometric figure (Triangle) Main Elements: - A triangle ABC is shown. - Point A is the top vertex, B is the left vertex, and C is the right vertex. - A line segment AD is drawn from vertex A to the base BC, meeting at point D. AD is labeled as perpendicular to BC. - A line segment AE is drawn from vertex A to the base BC, meeting at point E. AE is labeled as bisecting ∠BAC. - Points D and E are located on the line segment BC, with D to the left of E. - The triangle ABC is shaded grey. - Points A, B, C, D, E are labeled with red dots and text. **Problem 2** **Question Stem:** 如图在△ABC 中，∠BAC=80°, AD⊥BC 于 D, AE 平分∠BAC, ∠B=60°, 则∠DAE=多少度 **Chart Description:** Type: Geometric figure (Triangle) Main Elements: - A triangle ABC is shown. - Point A is the top vertex, B is the left vertex, and C is the bottom-right vertex. The orientation is different from the first problem, with BC being more vertical. - A line segment AD is drawn from vertex A to the base BC, meeting at point D. AD is labeled as perpendicular to BC. - A line segment AE is drawn from vertex A to the base BC, meeting at point E. AE is labeled as bisecting ∠BAC. - Points D and E are located on the line segment BC, with D being higher (closer to B) than E. - The triangle ABC is shaded grey. The triangle is oriented such that B is top-left, C is bottom-right, and A is top-right of B. The base BC is oriented roughly diagonally. - Points A, B, C, D, E are labeled with red dots and text.