an equator
A line segment that divides a circle in two is a chord.If the two parts of the circle are equal, the line segment is a diameter.See 'The Parts of the Circle' in Sources and related links, below.
Every line bisector divides a line into two halves: by definition!
A cord that crosses the center of a circle is a diameter, which divides the circle into two equal halves. It is a line segment, and it is the longest cord that can be drawn within a circle.However, if the segment begins at the center rather than crosses through it, and has the other endpoint on the circumference of the circle, it is not a cord, but is a radius of that circle.
If you take a circle for example, a line of symmetry is any line that can go through that circle and if you fold the circle in half it will be equal. So a line of symmetry is a line that you divide any shape in half with and have both halves be the same.
That line is called a "Diameter".
great circle
It is called a great circle. The equator is an example.
equator
The Equator...
The line that divides the Earth into two equal halves is called the equator. It is an imaginary line that runs horizontally around the Earth at 0 degrees latitude.
equator
an equator
You are drawing a line which divides the angle into 2 equal parts (halves).
A line segment that divides a circle in two is a chord.If the two parts of the circle are equal, the line segment is a diameter.See 'The Parts of the Circle' in Sources and related links, below.
A line passing through the center and crossing the circle.
A quarter circle has one axis of symmetry. An axis of symmetry is a line that divides a shape into two equal halves that are mirror images of each other. In the case of a quarter circle, if you draw a line through the center of the circle perpendicular to the diameter, it will divide the quarter circle into two equal parts that are mirror images of each other.