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.
Mayan pyramids were built by the Mayan people who lived in southern Mexico, Guatemala, Honduras, El Salvador and Belize. The pyramids, which were built starting nearly 3,000 years ago, are perhaps the greatest tourist attractions of Mexico and Central America.