Carlos draws a transversal, t, on two parallel lines AB and CD, as shown below.

He makes the following table to prove that the alternate interior angles are equal.

Statement Justification
angle 1 = angle 5 Corresponding angles of parallel lines are congruent.
angle 1 = angle 3 ?
angle 3 = angle 5 transitive property of equality,
angle 1 = angle 3,
angle 1 = angle 5,
therefore angle 3 = angle 5
Which is the missing justification

Question

Carlos draws a transversal, t, on two parallel lines AB and CD, as shown below.

He makes the following table to prove that the alternate interior angles are equal.

Statement Justification
angle 1 = angle 5 Corresponding angles of parallel lines are congruent.
angle 1 = angle 3 ?
angle 3 = angle 5 transitive property of equality,
angle 1 = angle 3,
angle 1 = angle 5,
therefore angle 3 = angle 5
Which is the missing justification

Vocaloid · Answer

@issiepooh next time please include diagrams in your post