Measuring Angles with a Protractor
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Objective
I can accurately measure angles using a protractor.
Part 1 of 4
Warm-up video
Khan Academy · 3:26Vetted channel
We don't generate video — this one is by Khan Academy 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
To measure an angle using a protractor, place the center of the protractor on the vertex of the angle.
- 2
Rotate the protractor so that the 0 degree mark lines up with one side of the angle, and then read the measurement where the other side intersects the protractor.
- 3
Angles that measure less than 90 degrees are called acute angles, while angles that measure more than 90 degrees are called obtuse angles.
Part 3 of 4
Practice
11 questions
What is the first step in measuring an angle with a protractor?
After placing the protractor's center on the vertex, what should you do next?
Part 4 of 4
Exit ticket
Quick comprehension check
“Draw an angle. Use a protractor to measure the angle you drew, and write down the measurement in degrees.”
Sample answer included in the free materials
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Teacher Guide
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