Math World explains the Golden Ratio, gives the formula for finding the irrational number, and expresses this value as an infinite series. Also defines and represents the Ratio geometrically, its relationship to the Fibonacci numbers,...

This MathWorld page gives information about permutations. Its real merit lies in the fact that there are examples for a clear understanding at various parts of the site and many links to learn detailed information about various aspects...

This site contains graphs of the exponential function, identities relevant to the function, and the Maclaurin series for this function.

This site explains how the Fourier transform of an exponential function is related to the Lorentzian function. Site also contains relevant links.

This site contains the definition for the term "Golden Rectangle," complete with detailed pictures, charts, and explanations.

This page gives a very complete description of the use of factorials in mathematics. The most general information is at the top.

This MathWorld page gives an explanation of combinations as they pertain to probability. Offers links to more complete information about various topics related to combinations.

This site contains informaiton on the law of combining volumes. A formula is given and links to key terms.

This site has information on specific heat,the amount of heat required to change a unit mass of a substance by one degree in temperature. Included are many links and formulas.

This is a detailed site with numerous links related to polyhedrons, the site explains the term polyhedron in terms of geometry and algebraic topology it briefly discusses special polyhedrons which link to other Math World sites which...

This site from ScienceWorld provides a brief two sentence overview of Abraham DeMoivre's life and his famous formulas. Links are provided to view both the Stirling's formula, as well as the Gaussian integral.

This MathWorld site shows pictures of polyhedra which can fill space. A discussion of these figures follows.

This site defines a convex polyhedron in terms of vectors and matrices. A table of examples, as well as an illustration, are given. This site has numerous links to related Math World sites.

This site provides the formula for circumference. Links are provided.

This site defines and describes significant digits along with examples. Includes references, citations, and links to further information.

This site from Mathworld.com provides information on what the dimension of an object means.

Math World site offers a method of determining if two vectors are parallel based on their cross product.

This one page Mathworld site has a number of examples of semiregular tessellations. A definition and a small amount of related information is given at the bottom of the page.

Math World offers the transformational matrix that allows us to rotate a two dimensional coordinate which in turn rotates the image. The page also offers the transformational matrix for rotation in three dimensions.

Math World offers a detailed discussion on Arbelos and the discoveries regarding this "shoemaker's knife." The site is very detailed and some parts of the discussion may be difficult for high school students to understand.

This site provides not only a definition of inscribed angle but also links to related terms.

Math World site offers the definition of frustum and links to view a frustum of a pyramid, cone, and sphere.

Come to this site to find the transformational matrix to find the vector rotated 90 degrees from the original. The site also states the special relationship between two perpendicular vectors when using the dot product.

Hyperbolic Geometry is discussed here with specifics on the lines in this geometry. The equations of the lines are represented as well as a desription of the lines. The site has links to other non-Euclidean Geometries.