Answer:
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Apex or Vertex: the vertex opposite that base line is called the apex.
Base angle: The base angles are the two angles created at the base line.
Base: one of the sides can be distinguished as being the base. It is not particularly important which one is chosen.
Altitude: The Altitude/height of a triangle is the length of a perpendicular from the apex the the base line.
Explanation:
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---Hope it's help---
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