:1. Parallels and MERIDIANS ☆Parallels :Parallels Are Lines of LatitudeThere are 180 parallels of latitudes apart from the EQUATOR. All parallels are not of equal length.Parallels don’t intersect. ☆ Meridians :Meridians Are Lines of Longitude.There are total 360 Meridians.All meridians converge at the poles and are thus of equal length.All meridians intersect at two places; the NORTH Pole and the South Pole.2. Great Circle and Small Circle ☆ Great Circle :A Great Circle is a circle which is drawn on the Earth’s surface in such a way that the center point of the Earth and the Great Circle is the same. The radius of the Great Circle is equal to the radius of the Earth. All the Great Circles divide the Earth into two equal HALVES. All meridians of longitude are Great Circles. ☆ Small Circle :The Small Circles are the circles whose center point is not the center of the Earth. The radii of the Small Circles are smaller than the radius of the Earth. All latitudes except the Equator are Small Circles.━━━━━━━━━━━━━━━━━━━━━━━━━━