Mathematics, 10.12.2019 00:31, haybales6019

Janet is trying to prove that the sum of the measures of the interior angles of a triangle is 180°.
which reason can she use to justify the statement in line 6?
a
alternate interior angles of parallel lines are congruent

b
corresponding angles of parallel lines are congruent

c
exterior angle theorem

d
symmetric property

Janet is trying to prove that the sum of the measures of the interior angles of a triangle is 180°.<

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Janet is trying to prove that the sum of the measures of the interior angles of a triangle is 180°.<...