糖糖在一个广告牌上看到下图,很好奇∠1、∠2、∠3、∠4、∠5、∠6这6个角加在一起的和会是多少呢?---**Extraction Content:** **Question Stem:** 6 糖糖在一个广告牌上看到下图,很好奇∠1、∠2、∠3、∠4、∠5、∠6这6个角加在一起的和会是多少呢? **Image Description:** Type: Geometric figure. Main Elements: - A large concave polygon, which appears to be a pentagon with one concave vertex. - An internal triangle overlapping with the concave vertex of the large polygon. - Angles are labeled: ∠1, ∠2, ∠3, ∠4 are interior angles at four vertices of the large polygon. ∠5 and ∠6 are two interior angles of the internal triangle. - The vertices with angles ∠5 and ∠6 appear to be on the edges of the large polygon adjacent to the concave vertex. - The third vertex of the internal triangle is inside the large polygon. - The outer boundary of the large polygon has 5 vertices. Four of these vertices have angles labeled ∠1, ∠2, ∠3, and ∠4. The fifth vertex is a concave vertex, and its interior angle is not labeled with a number. - The internal figure is a triangle. Two of its vertices lie on the edges of the large polygon, and the third vertex is inside the large polygon. The angles at the two vertices on the edges are labeled ∠5 and ∠6. The third angle of the triangle is not labeled.