Proof: Collinear Points Property 2

Let's prove the following theorem:

Proof:

Proof Table

#	Claim	Reason
1	(distance AB) + (distance BC) = distance AC	if m∠ABC = 180, then (distance AB) + (distance BC) = distance AC (Length is Sum of Parts)
2	distance BC = distance CB	distance BC = distance CB (Distance Equality Property)
3	(distance AB) + (distance CB) = distance AC	if (distance AB) + (distance BC) = distance AC and distance BC = distance CB, then (distance AB) + (distance CB) = distance AC (Substitution Example 10)

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