That depends how the circles are placed on the page and what lines are defined between the circles.
If two circles are drawn using the same centre, the two lines of the circles are parallel as they don't meet each other.Two straight lines (think of railway tracks) are drawn next to each other, but never meet, they are parallel lines.
Because they make big circles around the Earth.
great circles
Great circles.
The circles are called contour lines. A contour line connects points of the same elevation. When the lines are close together on a map that show the land is steep.
The equator and all lines of longitude are called great circles because the represent the circumference of the earth. The other latitude lines along the globe are smaller then the actually circumference.
That depends how the circles are placed on the page and what lines are defined between the circles.
The dirt circles are called fungo circles and are used by the coach to hit flyball practice to the fielders before the games.
Contour lines forming concentric circles typically represent a hill or a peak on the ground. The circles indicate a higher elevation point with each circle representing a certain elevation level.
Bold lines on a weather map typically represent fronts, which are boundaries between different air masses. Half circles indicate warm fronts, which occur when warm air meets and rises over cold air. This leads to steady precipitation and gradually increasing temperatures.
On maps, black lines between states represent boundaries or borders, where one state stops and the others starts. These are also called state lines.
The lines used to measure distances north and south of the equator are latitude lines. They include the equator (0 degrees latitude) and equidistant circles between the equator and the poles. Latitude lines represent the surface points having the same angle from the equator, and planes perpendicular to the Earth's north-south axis.
The lines in a structural formula represent the chemical bonds. These bonds are attractive forces between atoms that allow the formation of chemical substances.
a tail
State boarder
equilibrium between two states