Math Problem Statement
Cho tam giác ABC cân tại a. M là trung điểm của BC. Trên tia AM lấy điểm N. BN cắt AC tại D. CN cắt AB ở E. Chứng minh rằng BEDC là hình thang cân
Solution
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Math Problem Analysis
Mathematical Concepts
Geometry
Isosceles Triangle
Parallel Lines
Quadrilaterals
Formulas
-
Theorems
Symmetry of Isosceles Triangles
Properties of Trapezoids
Parallel Line Theorem
Suitable Grade Level
Grades 9-11
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