Which geographic area was added to the united states after the louisiana state purchase?

The Oregon territory

Explanation:

During this time the U.S. was fulfilling the manifest destiny, which was the expansion of the U.S. westward. After the Louisiana purchase in 1803, the U.S. bought the Oregon territory in 1846, west of the Louisiana territory, thus partially fulfilling the manifest destiny.

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map scale refers to the relationship (or ratio) between distance on a map and the corresponding distance on the ground. for example, on a 1: 100000 scale map, 1cm on the map equals 1km on the ground.