What is Manifest Destiny?"

Manifest destiny was a widely held cultural belief in the 19th-century United States that American settlers were destined to expand across North America.

Explanation:

There are three basic themes to manifest destiny: The special virtues of the American people and their institutions. The mission of the United States to redeem and remake the west in the image of the agrarian East. An irresistible destiny to accomplish this essential duty.

we are learning about that in school

Imperialist phrase first used in 1845 to urge annexation of Texas; used thereafter to encourage American settlement of European colonial and Indian lands in the Great Plains and Far West; Created by John L. O'Sullivan; "overspread the continent allotted by Providence (God) for the free development of our yearly multiplying millions"

Explanation: Hope this helps :)

6 units. ab and lo are congruent sides, and if ab= 6 units, then lo would be the same.