Proof: Midpoint Then 180

Let's prove the following theorem:

Proof:

Proof Table

#	Claim	Reason
1	m∠AMB = 180	if M is the midpoint of line AB, then m∠AMB = 180 (Angle Formed by Midpoint)
2	m∠AMB = (m∠AMX) + (m∠XMB)	if m∠AMB = 180, then m∠AMB = (m∠AMX) + (m∠XMB) (Collinear Points Property 2)
3	(m∠AMX) + (m∠XMB) = 180	if m∠AMB = (m∠AMX) + (m∠XMB) and m∠AMB = 180, then (m∠AMX) + (m∠XMB) = 180 (Transitive Property of Equality Variation 2)

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