Proof: Collinear Angles Property 6

Let's prove the following theorem:

Proof:

Proof Table

#	Claim	Reason
1	m∠BCX = m∠ACX	if m∠CBA = 180, then m∠BCX = m∠ACX (Collinear Angles Property 9)
2	m∠ACX = m∠BCX	if m∠BCX = m∠ACX, then m∠ACX = m∠BCX (Symmetric Property of Equality)

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