bisector of a triangle

Autor:Arthur Lee

A line is drawn to pass through the vertex A and cut its opposite side. Drag D to make this line: 1. bisect the angle at A; 2. bisect the side BC; 3. cut BC perpendicularly. Can we make 2 (but not 3) of these conditions true?

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Triangle with 3 Right Angles
Circle Passing Through 3 Points
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