Math Problem Statement
Bài 1.19. Cho tam giác ABC có A là góc tù, AB 4, AC = 5,S = 4V6. Tính BC và bán kính đường tròn nội và ngoại tiếp tam giác ABC.
Solution
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Math Problem Analysis
Mathematical Concepts
Trigonometry
Geometry
Formulas
Area of a triangle
Law of Cosines
Radius of circumscribed and inscribed circles in a triangle
Theorems
Law of Cosines
Suitable Grade Level
High School
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