几何学 - 2026 进行中

科目: 几何学
级别: XII
类别: 大学生
测试题目: 英语
问题示例: In a nondegenerate triangle, what is the center of its nine-point circle? The incenter, The symmedian point, The midpoint of the Euler line, The midpoint of the segment joining the circumcenter and orthocenter