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 Pyramid. The Mayan Pyramid is one of the outstanding features of the Maya, who lived in Belize, El Salvador, Guatemala, Honduras, southern Mexico, and the Yucatan Peninsula. The Maya built these Pyramid Temples starting about 3,000 years ago. Read on to learn more about the Mayan pyramids and the people who built them.