What are contours? Plz tell asap
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Definition: Contours are a collection of lines found on maps that show mountains, valleys and landforms. Contours are measured from sea level. If contours are closely spaced, it means that the land is very steep, if the contours are widely spaced, it means the land is more flat.
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A contour line of a function of two variables is a curve along which the function has a constant value, so that the curve joins points of equal value. It is a plane section of the three-dimensional graph of the function f parallel to the-plane.
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