The Awesome Figures of Circles. Screen Bean Says, “Circles Are Awesome Figures in Our World!”. Circle, Diameter, Radius, Circumference, Pi Presentation by Bobbie J. Taylor 2009. Objectives Understanding Some Measurements of Circles .
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Screen Bean Says, “Circles Are Awesome Figures in Our World!”
Circle, Diameter, Radius, Circumference, Pi
Presentation by Bobbie J. Taylor
What are the measurements inside, around, and across a circular swimming pool?
The kids say, “Screen Bean first needs to know the definition of a circle.”
A circle is a closed flat figure in which every point is the same distance from a given point, called the center of a circle.
Next, Screen Bean, you should know the diameter and radius of a circular pool.
Diameter describes both
a line segment through
the center of a circle with
endpoints on the circle
and the length of that
line segment. The diameter of a circle is always 2r.
Radius is any segment that
has one endpoint at the
center of the circle and the
on the circle. The radius is always ½d.
Wait, Screen Bean, you need to know the definition and formula for circumference and area of a circle before you swim across the pool.
Pi comes from the Greek letter pi which is written as π.
Written as a decimal, pi is close to the decimal approximation, 3.141592653589793…
Screen Bean says, “I have learned some basic measurements of a circle, and I’m now ready to swim the distance across the pool.” Screen Bean also thanks his teachers for explaining to him some geometric terms for circles and the awesome role circles play in our world.