Angle Relationships
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Objective
I can use angle relationships to find missing angle measures.
Part 1 of 4
Warm-up video
Professor Kat · 7:24
We don't generate video — this one is by Professor Kat 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 4
Key concepts
3 concepts
- 1
When two parallel lines are cut by a transversal, there are relationships between the angles formed, such as alternate interior angles and corresponding angles.
- 2
Supplementary angles form a straight line and their measures add up to 180 degrees.
- 3
Alternate interior angles are congruent, meaning they have the same measure.
Part 3 of 4
Practice
12 questions
What are vertical angles?
In the image below, lines AB and CD are parallel and cut by transversal EF. If angle ∠EFB is 50°, what is the measure of angle ∠DFH?
Part 4 of 4
Exit ticket
Quick comprehension check
“In the diagram below, lines m and n are parallel. Find the measures of angles x and y. Show your work. [Diagram: Two parallel lines, m and n, are intersected by a transversal. One angle is labeled 70°. Angle x is an alternate interior angle to the 70° angle. Angle y is on the same side of the transversal as the 70° angle and forms a straight line with it.]”
Sample answer included in the free materials
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Teacher Guide
Complete lesson plan with answer keys and alternate activities
Student Handout
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