Question

A is a line joining places with equal heights on the map​

Answer 1

Answer:

It is called longitude and lattitude .

Explanation:

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Answer 2

Answer:

cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. A contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills