In Euklid geometry, a circle is the set of all points on the field within a certain distance, called the radius, from a certain point, called the center. The circle is an example of a simple closed curve, dividing the field into the inside and the outside.
Circle of Elements
The center of the circle is a point which is located in the middle of the circle.
– Radius (r)
As mentioned previously, the radius of the circle is a line from the center of the circle to the arc of the circle.
– Diameter (d)
The diameter is a straight line connecting two points on the curve of the circle and through the central point. diameter value is twice the value of his fingers, wrote that d = 2r
In the circle, circular arc is a curved line that lies on the arc of the circle and connecting two arbitrary points on the curve.
A chord of a circle is a straight line in the loop that connects two points on the curve of the circle. In contrast to the diameter, not bow string through the center of circle O.
Segment is the area within a circle bounded by the bow and bowstring.
Sector in the area of a circle is a circle bounded by two radius of the circle and an arc is flanked by both the radius of the circle.
– An apothem
In a circle, An apothem a line connecting the center of the circle with the circle bowstring. Formed a line that is perpendicular to the bow string.