Circle of a sphere the Equator the only great circle. By contrast, all meridians of longitude, paired with their opposite meridian in the other hemisphere, form great circles. The diameter of the sphere which passes through the center of the circle is called its axis and the endpoints of this diameter are called its poles. A circle of a sphere can also be defined as the set of points at a given angular distance from a given pole. When the intersection of a sphere and a plane is not empty or a single point, it is a circle. This can be seen as follows:
Core sphere approximately 30% of the total product. Long before the Industrial Revolution, the core sphere was the entire economy. Families and communities provided for themselves by hunting and gathering. Then with industrialization came a market of competitive men working for wages and along with it what historians call the cult of domesticity. The core sphere became regarded not as part of the market sphere of the economy but more as emotional and altruistic behavior. Therefore, activities in the core sphere were not considered economic because they do not directly influence the market economy. As time has progressed towards the present, organizations