The equator is a great circle midway between the poles. It divides the earth in two halves that we call north and south hemispheres.
A degree is a unit of measurement for angles. If you cut a circumference in 360 equal pieces, each one would be one degree. Therefore one degree is a 1/360 of a circumference.
If you traveled along the equator line to the exactly opposite side of the earth, how many degrees did you travel?
| 90 degrees | |
|---|---|
| 360 degrees | |
| 180 degrees | |