Because it is a cleaner source of power than oil or coal, nuclear energy is often mistakenly referred to as a renewable resource. The sources of the energy that people use the world over fall into two general categories: renewable and nonrenewable.While the supply of renewable resources, such as sunshine and wind, is virtually limitless, nonrenewable resource supplies are finite.Some nonrenewable resources, including oil and coal, are the product of millions of years of conversion from fossils, the buried remains of ancient plants and animals.ecause it is a cleaner source of power than oil or coal, nuclear energy is often mistakenly referred to as a renewable resource. The sources of the energy that people use the world over fall into two general categories: renewable and nonrenewable.
A regular octagon has 8 lines of symmetry and one center point of symmetry. An octagon can also have fewer lines of symmetry: 0, 2 or 4 . A regular octagon has 8 lines of symmetry and one center point of symmetry <br /> <br /> An octagon can also have fewer lines of symmetry: 0, 2 or 4 .
More generally, an octahedron can be any polyhedron with eight faces. The regular octahedron has 6 vertices and 12 edges, the minimum for an octahedron; nonregular octahedra may have as many as 12 vertices and 18 edges. [1] Other nonregular octahedra include the following.1  Hexagonal prism: Two faces are parallel regular hexagons; six squares link corresponding pairs of hexagon edges.n octahedron can be placed with its center at the origin and its vertices on the coordinate axes; the Cartesian coordinates of the vertices are then.