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4. AABC is an isosceles triangle. BB' is the angle bisector.

Which is true about the bisector of the vertex angle of an isosceles triangle? A. It is parallel to the base, B. It is parallel to the left leg. C. It is coinciding to the base. D. It is perpendicular to the base at its midpoint

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4 AABC Is An Isosceles Triangle BB Is The Angle Bisector Which Is True About The Bisector Of The Vertex Angle Of An Isosceles Triangle A It Is Parallel To The B class=