They are:-
circumference
diameter
radius
sector
arc
chord
segment
tangent
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The three parts are:the interior of the circle, the points on the circle (points on its circumference) the outside of the circle.
There are five parts of a circle. They are-1.Radius: It is the parts of the circle that be defined as the distance between the center of the cirlce and a point on the circle.2.Diameter: It is the parts of the circle that be defined as the distance between the two point on the circle which cross through the center of the circle. Note: Every diameter of a circle is a chord; however, not every chord is a diameter. Whether a chord passes through the center determines if it is or is not the diameter.3.Chord: It is the parts of the circle that be defined as the line whose end points are on the circle.4.Secant Line: This line intersects the circle exactly at two points.5.Tangent Line: This line intersects the circle on the point.Thus we can define parts of a circle.
Only the diameter can divide the circle in to two equal parts.
A circle is not a plane shape. A circle is round a plane is not. A plane has parts that are similar to a circle shape.
There are 2pi in a circle. If we divide a circle into 8 equal parts, then each part will be pi/4, [(2pi)/8].