Final answer:
Without visual access to the maps or figures in question, it's not possible to provide specific answers. Typically, interpreting topographic maps involves looking at contour lines for relief and steepness, and questions related to electron distributions would involve quantum mechanics.
Step-by-step explanation:
The question provided seems to be related to topographic maps and their interpretation. Unfortunately, without the accompanying maps or figures, it is impossible to give a specific answer to the questions posed. Typically, topographic maps present information on contour lines, which indicate the elevation and relief of a given area. The spacing of the contour lines represents the regional relief, with closer lines indicating steeper areas. When comparing the steepness of two regions, one would look at the density of contour lines. A region is considered steeper if the contour lines are closer together. For a question about calculating the length and orientation of the fourth side of a plot based on the other three sides, we'd employ geometric principles or use the law of cosines if angles are known. In electron wave mechanics, regions with no probability of finding an electron are termed nodes, and for questions regarding the electron probability distribution around the nucleus, the answers would refer to the concepts derived from quantum mechanics and atomic theory.