half of a sphere is a hemisphere
hemisphere
S or O
Bisector.
angle bisector
bisector
hemisphere
The imaginary line that cuts the earth into two equal parts is called the equator. It is an imaginary circle around the Earth that is equidistant from the North and South poles. It divides the Earth into the Northern Hemisphere and the Southern Hemisphere.
The equator.
Prime meridian
The equator is the parallel that divides the Earth into two equal parts: the Northern Hemisphere and the Southern Hemisphere. It is an imaginary line situated halfway between the North Pole and the South Pole.
bisect
S or O
Equator (0 degrees)
T
Bisector.
A bisector.
Bisecting an angle