Estimate the Area of an Irregular Figure - Circles Included!

Circles Radius Diameter & Pi Math Learning Upgrade

~Lyrics~

A circle is a shape with all points on the circle the same distance from the center point.
A radius is a straight line from the center to the circle's edge.
A diameter is a line that cross the end point of a circle that passes through the center point.
A circumference is the distance around a circle


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diameter d is twice the radius
radius r is half the diameter
pi is circumference, c divided by the diameter
pi is 3.14 - approximately
circumference is pi d or 2 pi r
area is pi r square