Question

Why is it equator also called the great circle​

Answer 1

answer:

The Equator is another of the Earth's great circles. If you were to cut into the Earth right on its Equator, you'd have two equal halves: the Northern and Southern Hemispheres. The Equator is the only east-west line that is a great circle. All other parallels (lines of latitude) get smaller as you get near the poles

Answer 2

Answer:

When the two are combined, they create a full great circle which cuts the Earth into equal halves. The only line of latitude, or parallel, characterized as a great circle is the equator because it passes through the exact center of the Earth and divides it in half.Jun 24, 2016