SOLUTION: the proof of the bisector of the vertex angle of an isosceles triangle is perpendicular to the base at its midpoint

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Question 1107352: the proof of the bisector of the vertex angle of an isosceles triangle is perpendicular to the base at its midpoint
Answer by ikleyn(52810) About Me  (Show Source):
You can put this solution on YOUR website!
.
Lesson
    - An altitude, a median and an angle bisector in the isosceles triangle
in this site.


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Also,  you have this free of charge online textbook on Geometry
    GEOMETRY - YOUR ONLINE TEXTBOOK
in this site.

The referred lesson is the part of this online textbook under the topic  "Properties of triangles".


Save the link to this online textbook together with its description

Free of charge online textbook in GEOMETRY
https://www.algebra.com/algebra/homework/Triangles/GEOMETRY-your-online-textbook.lesson

to your archive and use it when it is needed.