The diameter of a circle divides it into two halves
A line of symmetry divides a figure into two matching halves.
Hemispheres
What is axis of symmetry? the axis of symmetry is a line that divides a planar figure into two congurent reflected halves
180
When a line divides another in two equal parts, it is called a bisector. If the bisector happens to cross the other line at right angles, it is called a perpendicular bisector.
daimeter..
diameter
That line is called a "Diameter".
great circle
A great circle
It is called a great circle. The equator is an example.
An equator is a circle that divides the surface of an object into two equal halves. The term is usually used to explain the circle that divides a plane,t like the Earth, in to two hemispheres.
A cut through any great circle does.
equator
prime merideane and equator The equator divides the earth into two equal halves.
The 2 halves in a circle are the 2 semi circles.
equator