Circle:Every point on a circle is equidistance from some fixed point, which is the center. A circle is divided into 360 degrees. Only one circle can pass through three points not in a straight line.Chord:A length of line or segment connecting two points on a circle.Diameter:Length of line (chord) passing through the center of a circleRadius:A line Segment connecting the center of a circle to any point on the circle. The dimension is half that of a diameter.Tangent:A line which has only one point touching the circle. A tangent is always perpendicular to the radius.Arc:Is part of a circle.Pi:The ratio of the diameter of a circle to its cir-cumference. The symbol for Pi is . Pi=(3.141592654) Circumference:The distance around a circle (the perimeter). The cir- cumference = diameter x Area: x Radius2http://www.dvcplanners.com
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