Download 8 Grade MIU 2: 2D Geometry 2 Angle Measures Essential Question

8th Grade MIU 2: 2D Geometry 2
Angle Measures
Essential Question
What angles are congruent if two parallel lines are cut by a transversal?
What angles are supplementary if two parallel lines are cut by a transversal?
Learning Targets
*I can determine unknown angle measures using known angle relationships created by two parallel lines and a
transversal.
*I can identify special angle pairs by understanding the relationships between parallel lines and transversals.
*I can use facts from the angle sum and exterior angles or triangles to create a conjecture to classify and solve
for angles in polygons.
Key Vocabulary – write your own definition or provide your own example for each of the following:
Exterior Angles
Interior Angles
Alternate Exterior Angles
Alternate Interior Angles
Same Side Interior Angles
Corresponding Angles
REVIEW FROM 7TH GRADE
Transversal
Adjacent Angles
Supplementary Angles
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Complementary Angles
Self-Evaluation; 8th Grade, MIU 2, 2D Geometry 2 – Angle Measures
Analyze each of the following skills using the following rubric. Put today’s date under each skill level to indicate your
learning progress.
Score
4
3
2
1
What does this mean?
I understand it, I can do it, and I can comfortably explain it to another learner.
I can do this! I am confident that I understand it and think I can apply it.
I am learning, but I am not quite there yet.
I am not there yet. I need a lot of help.
Skills
a. I can explain why the sum of the interior angles of a triangle is 180 degrees.
8.G.5
b. I can explain why an exterior angle of a triangle is equal to the sum of the opposite
interior angles.
8.G.5
c. I can explain why the sum of the three exterior angles of a triangle equals 360 degrees.
8.G.5
d. I can use my knowledge of interior and exterior angle relationships in triangles to find
unknown angle measurements to solve real-world and mathematical problems.
8.G.5
e. I can explain how to use the relationships of angles created when parallel lines are cut
by a transversal.
8.G.5
f. I can use my understanding of angle relationships to find unknown angle
measurements to solve real-world and mathematical problems.
8.G.5
g. I can explain the angle-angle criterion for similarity of triangles.
8.G.5
My own skills I learned:
h.
i.
j.
Helpful Diagrams:
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