Visualizing Pi and Circumference Formulas VR Lesson (CCSS.MATH.CONTENT.7.G.B.4)

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United States Cass Coomber
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Published on ● Video Link: https://www.youtube.com/watch?v=afE60UREvoM


Duration: 10:13
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In this lesson, I use Tilt Brush VR to review the formula for Circumference of Circles and discuss where Pi comes from. This is a 7th grade standard:

CCSS.MATH.CONTENT.7.G.B.4
Know the formulas for the area and circumference of a circle and use them to solve problems; give an informal derivation of the relationship between the circumference and area of a circle.

Rule 5: An important mistake I made in the video is to say that "Pi is irrational because it has no end as a decimal," but that is not correct. Pi IS an irrational number, but while irrational numbers can be unending, but another important part of them is that they can't be expressed as a ratio of 2 integers.

So .33333... etc, can be written as 1/3 and is considered a 'rational' number despite being unending.



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