Proof: Angle Addition Theorem 2

Let's prove the following theorem:

Proof:

Proof Table

#	Claim	Reason
1	m∠ABC = (m∠ABX) + (m∠XBC)	if point X lies in interior of ∠ABC, then m∠ABC = (m∠ABX) + (m∠XBC) (Angle Addition Theorem)
2	(m∠ABX) + (m∠XBC) = m∠ABC	if m∠ABC = (m∠ABX) + (m∠XBC), then (m∠ABX) + (m∠XBC) = m∠ABC (Symmetric Property of Equality)

Comments

Please log in to add comments