Question

except except for the equator, other parallels of latitude are not great circles .why?

Answer 1

Because other parallels of latitude do not lie on the plane passing through the center of Earth nor do they divide the earth into two equal halves,which only Equator does.Thus Equator is the only latitude which is a Great Circle.

Answer 2

❗❕Cuz all latitudes cannot divide the earth into two equal halves but the equator can hence it is called a great circle and other parallel lines gets smaller as one moves towards the equator❗❕   HOPE IT HELPS YOU ✌❤❤