Contour lines do not ever cross one another because each line represents a different elevation on a topographic map. However, contour lines may merge in the case of a vertical cliff. More » Math Geometry Shapes

Examples of art line designs include geometric optical art, black and white straight line patterns and rhythmic line designs. Line art designs are mainly composed of lines in varying weights, orientation and perspectives... More » Art & Literature Fine Art Drawing

A contour line drawing, or simply contour drawing, is an outline of the main features in a drawing. Some main features may be sketched out, but the purpose of a contour drawing is to determine the mass and size that the ... More » Art & Literature Fine Art Drawing
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Contour lines on a map indicate elevation or depth. Numeric notations on contour lines refer to the level of elevation, or height above sea level. More » Geography Maps & Cartography

A contour in geography refers to a line on a contour or topographical map that designates a specific and constant elevation above sea level. Contour lines are used to express a three-dimensional image of terrain on a two... More » Geography Maps & Cartography

The term "contour interval" refers to the vertical distance between contiguous contour lines in terms of elevation. Commonly illustrated on a topographic map, the elevations between contour lines are uniformly spaced alo... More » Geography Maps & Cartography

A regular decagon has 10 lines of symmetry, one line drawn through each vertex and one line drawn through the midpoint of each edge. A line of symmetry indicates where a polygon can be folded in half to form two equal sh... More » Math Geometry Shapes