Circle: set of points at the same distance os the center.
Cincurference: it is the full lengh of a circle , it is the line around a circle.
Center:is the point equidistant to any points on a circle .
Radius: it is the length of a line segment from center to its perimeter.
Diameter : it is a line segment past to the center and conects 2 points of a circle .
Chord: is a line that conect 2 points but not past to the center .
Arc: segment of a circle .
Arrow : perpendicular line from the middle of chord.
Tangent: it is a line that cut in only one point of a circle.
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