The purpose of this lesson is to learn about the circumference of …
The purpose of this lesson is to learn about the circumference of a circle and how the circumference is related to the diameter and radius of a circle.
Included is a YouTube video to support Grade 7 Blended Learning Math - Unit 4.2: Circles and Area - Circumference of a Circle.
The ratio of a circle's circumference to its diameter is always the …
The ratio of a circle's circumference to its diameter is always the same: 3.14159... and on and on (literally!) forever. This irrational number, pi, has an infinite number of digits, so we'll never figure out its exact value no matter how close we seem to get. Reynaldo Lopes explains pi's vast applications to the study of music, financial models, and even the density of the universe.
Working as a team, students discover that the value of pi (3.1415926...) …
Working as a team, students discover that the value of pi (3.1415926...) is a constant and applies to all different sized circles. The team builds a basic robot and programs it to travel in a circular motion. A marker attached to the robot chassis draws a circle on the ground as the robot travels the programmed circular path. Students measure the circle's circumference and diameter and calculate pi by dividing the circumference by the diameter. They discover the pi and circumference relationship; the circumference of a circle divided by the diameter is the value of pi.
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