A circle is the set of all points in a plane that are a given distance from a given point in that plane.  The given point is the center of the circle.  A radius of a circle is a segment that has one endpoint at the center of the circle and the other endpoint on the circle.

If a circle has an area A square units and a radius of r units,

then the formula would be A=πr2

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A=(3.14)(2.5)2
Answer=19.6
What is the area of this circle?
π=3.14
Radius=2.5
Ra

 

 

 

 

 

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