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Circle formula is?
C = 2 x 3.14 x r
The total distance around the outside of a circle or any closed curved shape is what?
Circumference
Pi is approximately what number?
3.14
Circumference acts as what?
Perimeter
A straight line segment from the center of a circle or sphere to any point on its outer edge (circumference/surface) is what?
Radius
Do circles have corners?
NO
Is a circle 2-D or 3-D?
2-D
Center, Radius and Diameter are all characteristics of..?
Circle
