Angle Addition
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Objective
I can find the measure of a larger angle by adding the measures of its smaller component angles.
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
12 questions
Define what it means for angle measure to be additive.
Angle ABC is formed by two smaller angles, ABD and DBC. If angle ABD measures 30° and angle DBC measures 45°, what is the measure of angle ABC?
Part 3 of 3
Exit ticket
Quick comprehension check
“Two parallel lines are cut by a transversal. One angle formed measures 130°. This angle and another angle, x, form a straight line. Angle x is composed of two smaller angles, one measuring 20°. What is the measure of the other smaller angle? A triangle has angles measuring 55° and 65°. The third angle, x, is formed by two smaller angles, one measuring 30°. What is the measure of the other smaller angle that makes up angle x?”
Sample answer included in the free materials
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Teacher Guide
Complete lesson plan with answer keys and alternate activities
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