The sides of triangles do not have set names, except in the case of the right triangle (where one side opposite the right angle is called the hypotenuse). They are usually labâ¦elled arbitrarily a, b and c.
Mound Builders lived in the Ohio River Valley and in the Wisconsin area. Also, Mound Builders lived from the Great Lakes to the Gulf of Mexico and from the Mississippi and Missouri Rivers to the Appalachian mountains.
Spiro Mounds. Spiro Mounds (34 LF 40) is major Northern Caddoan Mississippian archaeological site located in Eastern Oklahoma. The 80-acres site lies near the Arkansas River in Fort Coffee, seven miles north of the town of Spiro.