几何学 - 2026 进行中

科目: 几何学
级别: IX
类别: 大学生
测试题目: 英语
问题示例: In a cyclic hexagon, the sums of three pairs of opposite angles are 180°. If five of its interior angles are 112°, 98°, 124°, 86°, and 105°, what is the sixth angle? 65°, 72°, 81°, 75°