Exercises of Topic 7: Special parts of a triangle (B)

Art of Problem Solving (AoPS): Introduction to Geometry, Topic 7: Special parts of a triangle (B), Exercises (Selective)
Before taking the exercises, you can watch the lecture of Topic 7 (B) here: • Topic 7: Special parts...
and Topic 7 (A) here: • Topic 7: Special parts...
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