Math Problem Statement
cho tam giác cân ABC cân tại A (AB=AC). Gọi H là trực tâm của tam giác, đường cao CE. Gọi D, M, N lần lượt là trung điểm của BC, AB,CH. Chứng minh rằng 4 điểm D, M, E, N cùng nằm trên 1 đường tròn
Solution
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Math Problem Analysis
Mathematical Concepts
Triangle geometry
Circle geometry
Orthogonality
Formulas
-
Theorems
Midpoint theorem
Cyclic quadrilateral theorem
Suitable Grade Level
High school
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