Which one of the following statements is correct ........

Geography Shape and Motions of Earth

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Which one of the following statements is correct?

Great circle represents the longest distance on the surface of the earth.

All parallels are great circles.

It is possible to draw infinite number of great circles on the sphere.

Great circles are not useful for the navigators.

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Explanation:

Great circles represent the shortest distance on the earth.Only equator is a great circle and all other parallel are small circles because a great circle divides the globe into two equal parts and its centre coincides with the centre of the globe. One can draw infinite number of great circles on the sphere. Great circles are very useful for navigation because they represent the shortest distance on the earth.