What is the missing step in the given proof? Statement: m∠4 = m∠15 Reason: Substitution Property of Equality Statement: m∠4 + m∠8 = 180° Reason: definition of supplementary angles Statement: ∠7 and ∠8 are supplementary. Reason: Linear Pair Theorem Statement: m∠4 = m∠16 Reason: Transitive Property of Equality Statement: ∠15 and ∠8 are supplementary. Reason: Transitive Property of Equality
