-- Each meridian joins the north and south poles, making it a semi-circle.
-- The center of the circle of which it is a semi is at the center of the Earth,
making it a 'great' one.
Among parallels of latitude, only the equator is a great circle.
Any meridian, paired with the meridian exactly 180 degrees different in longitude,comprise a great circle.If the two meridians are not exactly 180 degrees apart in longitude, then they'renot in the same plane, and they don't form a circle at all.No two meridians of longitude can combine to form a small circle.All parallels of latitude, except the equator, are small circles. The equator is the onlygreat one.
There are 360 meridians of longitude because it is a convenient way to divide the Earth's surface into equal sections. Each meridian represents one degree of longitude, and there are 360 degrees in a circle. This system allows for easy navigation and measurement of distances on Earth.
Each pair of meridians form a continuous loop around the Earth and meet at the poles. The Prime Meridian and the International Date Line are the two most common pairs of meridians used for navigation and timekeeping.
That's a lot like asking "How many marks are there on a ruler in an interval of 5 inches ?" There is no standard 'set' of meridians. Various maps and globes print more meridians or fewer, and some print none at all. A meridian can be printed on a map at any longitude you name. There is no fixed number of them.
The Equator divides the Earth into two equal halves, the Northern Hemisphere and the Southern Hemisphere.
The 2 halves in a circle are the 2 semi circles.
The diameter of a circle divides it into two halves
Two meridians can form a great circle when they are 180 degrees apart, as they represent opposite points on the Earth's surface. For example, the Prime Meridian at 0 degrees and the Antimeridian at 180 degrees are such meridians. Any two meridians that are 180 degrees apart will create a great circle, which is the largest circle that can be drawn on the surface of a sphere.
Any meridian, paired with the meridian exactly 180 degrees different in longitude,comprise a great circle.If the two meridians are not exactly 180 degrees apart in longitude, then they'renot in the same plane, and they don't form a circle at all.No two meridians of longitude can combine to form a small circle.All parallels of latitude, except the equator, are small circles. The equator is the onlygreat one.
daimeter..
The Great Circle
Hemispheres
diameter
A small circle, in geometry, refers to a circle with a radius that is smaller than a larger reference circle, often used in discussions about spherical geometry or in the context of navigation and mapping. It is defined as the intersection of a sphere with a plane that does not pass through the center of the sphere. Unlike great circles, which divide a sphere into two equal halves, small circles do not represent the shortest path between points on the sphere's surface.
There are 360 meridians of longitude because it is a convenient way to divide the Earth's surface into equal sections. Each meridian represents one degree of longitude, and there are 360 degrees in a circle. This system allows for easy navigation and measurement of distances on Earth.
Each pair of meridians form a continuous loop around the Earth and meet at the poles. The Prime Meridian and the International Date Line are the two most common pairs of meridians used for navigation and timekeeping.
When a circle is folded along its diameter, it creates two congruent halves or semicircles.