Answer :

tgod73

Step-by-step explanation:

1) given

2) 2 non - common sides in 1 ray

3) supplemental

5) opposite angles are congruent

gufeliz1965

Reasons:

(1) Given

(2) their 2 non-common sides in 1 ray

(3) definition of supplemental angles

(4) Substitution

(5) Opposite angles are congruent (equal)

(6) Substitution

(7) Definition of supplementary angles

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