Pi is the ratio of the circumference of a circle to its diameter, or pi = C/d. From this formula we then get the formula C = pi x d.
I go through practice problems where we calculate the circumference, given either the diameter or the radius, and then a problem where we are asked the radius, given the circumference. Lastly, we look at at real-life problem that involves the length of a path in a garden.
Tagged under: circumference,radius,diameter,pi,7th grade,math,geometry,circumference circle,circle
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