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.
Why did the Mound Builders build mounds and what was the purpose of mounds built by the Mississippians? The Adena and Hopewell built mounds as sites to bury their dead. The Mississippians continued this tradition, but they also built a new type of mound, large pyramids with flat tops.