Adam makes several statements after he observes the diagram above, which has the following properties: A, B, C, and D are collinear
B is the midpoint of AC¯¯¯¯¯¯¯¯
C is the midpoint of BD¯¯¯¯¯¯¯¯

Identify the statements as theorems, conjectures, or axioms.

Statement Theorem, Conjecture, or Axiom
AB=12AC
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There is only one line that can be drawn connecting the points.
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4AB=AD
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AB+BC+CD=AD