Proof: Supplementary Angles Theorem (Converse)

Let's prove the following theorem:

Proof:

Proof Table

#	Claim	Reason
1	(m∠ABX) + (m∠XBC) = 180	if m∠ABC = 180, then (m∠ABX) + (m∠XBC) = 180 (Collinear Points Theorem)
2	∠ABX and ∠XBC are supplementary	if (m∠ABX) + (m∠XBC) = 180, then ∠ABX and ∠XBC are supplementary (Supplementary Angles Property (Converse))

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