Final answer:
The boundary between the United States and Canada west of the Great Lakes is an example of a geometric boundary, which is a political boundary, generally defined and delimited as a straight line or an arc, predominantly following the 49th parallel.
Step-by-step explanation:
The boundary between the United States and Canada west of the Great Lakes is an example of a geometric boundary. A geometric boundary is a political boundary, defined and delimited as a straight line or an arc. In this case, most of the boundary between the United States and Canada is divided by the 49th parallel, a line of latitude. This line was established as a result of negotiations between the two countries, as mentioned in the 1846 Oregon Treaty between the British and the United States. President Polk's assertion of the United States' right to full control of Oregon Country led to defining the boundary at the 49th parallel. This example fluidly shows how geopolitics can shape the design of borders.
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