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.
Mississippian people in eastern Arkansas were using mounds when Spanish explorers arrived in 1541, and the Caddo in the Red River valley were still using mounds during the winter of 1691â92, when explorers from Mexico visited them.