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.
The next Mound Builders were the Hopewell. Their way of life was similar to the Adena, but their exact relationship to these earlier people is unclear. They may have been the Adenaâs descendants or may have attacked the Adena and killed them off. The Hopewell culture thrived from about 200 B.C. to A.D. 400.