the bisector of the vertex angle of an isosceles triangle is?
A.parallel to the base at its midpoint.
B.perpendicular to the base at its midpoint
C. half the length of it's base
D.equal to the length of it's base.
A.parallel to the base at its midpoint.
B.perpendicular to the base at its midpoint
C. half the length of it's base
D.equal to the length of it's base.
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Answer:
B.perpendicular to the base at its midpoint