Final answer:
The United States' involvement in the construction of the Panama Canal is an example of how they used the Roosevelt Corollary.
Step-by-step explanation:
An example of how America used the Roosevelt Corollary or Dollar Diplomacy was the involvement in the construction of the Panama Canal. The United States, under President Roosevelt, supported Panama in its struggle for independence from Colombia in order to secure control over the Panama Canal Zone. The Hay-Bunau-Varilla Treaty was then signed, giving the United States control over the construction, operation, and defense of the canal.
This example involved President Roosevelt, Panama, Colombia, and the United States. By utilizing the Roosevelt Corollary, the United States justified its intervention in Panama's affairs in order to assert its dominance and further its economic and strategic interests in the region.