It is a vinculum
If it's a fraction then it's the denominator which divides into the numerator
Every line bisector divides a line into two halves: by definition!
It is a line which divides into two (or more) rays.
bisecting
To divide
It is a vinculum
fraction bar
The line that separates the top number (numerator) from the bottom number (denominator) of a fraction can be called a dividing line - since this is what is happening in the sum itself to calculate the fraction.
The Vinculum, in some countries, is the name given to the horizontal line used to separate the numerator and denominator in a fraction.
If it's a fraction then it's the denominator which divides into the numerator
The line separating the numerator and denominator when displayed as one number over another is called Vinculum, or sometimes referred to as the fraction bar. If the line is a slanting line (such as in "9/10"), it's referred to as the solidus.
Every line bisector divides a line into two halves: by definition!
To bisect is to cut or divide into halves. A bisecting line would then be a line that divides another line in half or a line that divides an angle in half.
The equator is the imaginary line that divides the Earth into the Northern and Southern Hemispheres.
The imaginary line that divides the earth into the northern and southern hemispheres is called Equator, the line that divides it into the eastern and western hemispheres is the prime meridian.
The midpoint divides a line segment into congruent parts.