Question

state the two uses of a great circle​

Answer 1

Answer:

The most famous use of great circles in geography is for navigation because they represent the shortest distance between two points on a sphere. Due to the earth's rotation, sailors and pilots using great circle routes must constantly adjust their route as the heading changes over long distances. The only places on Earth where the heading does not change is on the equator or when traveling due north or south.

Because of these adjustments, great circle routes are broken up into shorter lines called Rhumb lines which show the constant compass direction needed for the route being traveled. The Rhumb lines also cross all meridians at the same angle, making them useful for breaking up great circles in navigation.

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Answer 2

Answer:

Equator - It is the imaginary line which divided the Earth in two equal halves .

North half is known as - Northern hemisphere.

South half is known as - Southern hemisphere.

Value of equator is 0°