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Introduction to the Circle Radius and Diameter formulas
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Circle - a simple closed curve
Radius - straight line that starts in the center and goes to an endpoint (R=1/2D)
Diameter - a line segment that goes through the center of the circle (D=2R)
Circle - 360 degrees
Semicircle - half of a circle 180 degrees
Radius - straight line that starts in the center and goes to an endpoint (R=1/2D)
Diameter - a line segment that goes through the center of the circle (D=2R)
Circle - 360 degrees
Semicircle - half of a circle 180 degrees
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