Angles Formed by Parallel Lines and Transversals

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Objective

I can find the measures of angles formed by parallel lines cut by a transversal when given the measure of one angle.

Part 1 of 3

Warm-up video

Unknown Channel · 5:00

We don't generate video — this one is by Unknown Channel on YouTube. The practice questions and exit ticket below were drafted by AI for this objective, and every question is editable in the teacher guide.

Part 2 of 3

Practice

2 questions

1

Two parallel lines are intersected by a transversal. One of the angles formed measures 110°. Find the measure of the angle that is supplementary to it. Explain your reasoning.

2

Imagine a street map where two streets run parallel to each other. A third street crosses both of them at an angle. If one of the alternate interior angles formed where the third street crosses the parallel streets measures 75°, what is the measure of the corresponding angle on the other parallel street? Explain how you found your answer.

Part 3 of 3

Exit ticket

Quick comprehension check

Two parallel lines are intersected by a transversal. If one angle measures 70°, what is the measure of its corresponding angle? Two parallel lines are intersected by a transversal. If one angle measures 130°, what is the measure of the angle that is on the same side interior? Two parallel lines are intersected by a transversal. If one angle measures 55°, what is the measure of its alternate exterior angle?

Sample answer included in the free materials

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