<span>A point of intersection of three or more edges is a vertex. A polyhedron with two faces (bases) that are congruent and parallel polygons and whose other faces (lateral faces) are parallelograms formed by segments (lateral edges) connecting the corresponding vertices of the bases.</span>
Answer: To locate interesting landforms, to find their way through an area,
Explanation:
Generally a topographic map is used to share information of certain area, it describes the distances between the points on the surface of the earth and their elevation levels with the help of contour lines.
One can understand fully an area with the help of a topographic map, even without visiting that area.
So a topographic map gives you three dimensional information of an area.
It is mainly required before the design of any thing over any area.