According to document E why did texans revolt

nothing certain is known about what happened, but it seems that the country declined gradually, perhaps due to bad government, or, more likely, due to a series of bad harvests, which resulted in widespread and recurrent famine.

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

because it took place after the war of 1812 had come to an end.