Question

Can anyone help? Please respond if you don't understand the question.
Stephanie’s teacher gave her the following figure and asked her to provide a statement that would guarantee lines a and b are parallel.



Which statement should Stephanie use to prove that lines a and b are parallel?

Answer 1

∠2 = 60°
∠4 = 60°
∠5 = 120°
∠3 = 120°

Answer 2

The two lines are parallel if and only if the corresponding angles are equal. The corresponding angle to the 120 degree is angle 5. So angle 5 must be 120 degrees for the two lines to be parallel.

Answer 3

how long you have tried?

Answer 4

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