Hemispheres
The diameter of a circle divides it into two halves
A line of symmetry divides a figure into two matching halves.
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.
3 / 0.5 = 6
a symmetrical line.
a hemisphere
Half a sphere is a hemisphere
When a circle is folded along its diameter, it creates two congruent halves or semicircles.
A great circle
The 2 halves in a circle are the 2 semi circles.
The diameter of a circle divides it into two halves
That line is called a "Diameter".
a line
They occur when you divide something on a line of symmetry.
Bilateral symmetry means you can divide the shape into two halves, and the halves would be congruent. Radial symmetry means all the parts that are connected to a common point are congruent.
A half of a quarter of a circle is 1/8 of a circle. There are four pieces making 1/4. If you split all of them into halves you have eighths.
It is called a great circle. The equator is an example.