No captions Captions Stop the video above first if it is playing.
No captions Captions Stop the video above first if it is playing.
The students continue exploring angles by measuring two angles in radians.
Episode Supports
Studentsโ Conceptual Challenges
Mary initially indicates that the bottom half of the circle would be approximately 3, and then changes it and says it would be exactly ๐. However, without the unit โradiansโ explicitly stated, this isnโt correct. To assess your studentsโ understanding of the difference between ๐ and ๐ radians, use Question 2 under Supporting Dialogue.
Focus Questions
For use in a classroom, pause the video and ask these questions:
[Pause the video at 0:21] Find the measure in radians of angle ABC. What tools did you use?
[Pause the video at 1:39] Find the measure in radians of the new angle ABC. How does your method compare to what Claire and Mary did?
Supporting Dialogue
[Pause the video at 3:29] Mary has written two numbers, 3 and ๐, inside a circle. Talk with a partner to discuss what you think Mary means by each of these numbers? Where do you think the 3 came from? The ๐?
[Pause the video at 4:40] Why is the bottom half of the circle exactly ๐? And do you think it is exactly ๐, or exactly ๐ radians? What is the difference?
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