GeoMaths MathHelp Material
This site provides students with mathematics self-study material which is embedded within the context of the geosciences. The material consists of many MathHelp "notebooks" covering specific mathematical topics related to a relevant geological context, such as plate velocity or cliff erosion. The notebooks ...
Author(s): Rowena Bowles

GeoMaths - Revision Topics
This site, part of the University College London's GeoMath site, provides a review of basic math skills, including basic equations and functions, areas and volumes, and coordinates and graphs. The notation is linked throughout to a glossary of terms, and several examples are geologically based and have ...
Author(s): Rowena Bowles

Geometry Formulas and Facts
This excerpt from the CRC Standard Mathematical Tables and Formulas covers geometry, excluding differential geometry. It is a reference for advanced students, and covers the material in quick, condensed sections of notes. Notes and diagrams are organized into sections and subsections, starting with ...
Author(s): Silvio Levy

Math Help Pages - Calculus Index - Technical Tutoring
This site features a menu of lessons and reference material on calculus concepts. Featured are several definitions of the derivative, treatments of discontinuity, and discussion of logarithms, integration, and antiderivatives. The sections are presented with clear notation and examples.
Author(s): Phil Otken

Math Help Pages - Trigonometry Index - Technical Tutoring
Beginning with a general review, this site provides a good refresher on basic trig identities, functions and angles. Good diagrams for unit circle and triangle trigonometry.
Author(s): Phil Otken

Math2.org (Formerly "Dave's Math Tables")
This general math site offers reference material on a host of math topics, plus a math message board and links to relevant material online. The tables cover a range of math skills, from basic fraction-decimal conversion to the more advanced calculus and discrete math. The information is presented in ...
Author(s): David Manura

Technical Tutoring
Once a website for online, one-on-one tutoring, Technical Tutoring is now a repository of help pages developed by Phil Otken. Examples and lessons on many aspects of calculus, algebra, trigonometry, and basic chemistry. Each lesson includes a concise discussion and step-by-step instructions, formulas, ...
Author(s): Phil Otken

Understanding Algebra
The complete contents of this algebra textbook are available here online. This text is suitable for high-school Algebra I, preparing for the GED, a refresher for college students who need help preparing for college-level mathematics, or for anyone who wants to learn introductory algebra. I am especially pleased to help homeschoolers. Includes a graphing applet, a prime factorization machine, and a prime number list. Brennan uses inserts to answer common questions as the lesson goes on, helping t
Author(s): No creator set

3:4:5 triangle
An interactive applet and associated web page that demonstrate the properties of a 3:4:5 triangle - one of the Pythagorean triples. The applet shows a right triangle that can be resized by dragging any vertex. As it is dragged, the remaining vertices change so that the triangle's side remain in the ...
Author(s): John Page

30-60-90 triangle
An interactive applet and associated web page that demonstrate the properties of a 30-60-90 triangle. The applet shows a right triangle that can be resized by dragging any vertex. As it is dragged, the remaining vertices change so that the triangle's angles remain 30 degrees, 60 degrees and 90 degrees ...
Author(s): John Page

45-45-90 triangle
An interactive applet and associated web page that demonstrate the properties of a 45-45-90 isosceles right triangle. The applet shows a right triangle that can be resized by dragging any vertex. As it is dragged, the remaining vertices change so that the triangle's angles remain 45 degrees, 45 degrees ...
Author(s): John Page

Area of a circle segment
An interactive applet and associated web page that demonstrate the area of a segment of a circle - a part of a circle cut off by a chord. The applet shows a circle and a segment of that circle, the ends of which can be dragged to resize the segment. As you drag the endpoints, the area is continuously ...
Author(s): John Page

Area of a rectangle. Definition and formula
A web page and interactive applet showing the ways to calculate the area of a rectangle. The user can drag the vertices of the rectangle and the other points change automatically to ensure it remains a rectangle. A grid inside the shape allows students to estimate the area visually, then check against ...
Author(s): John Page

Area of a square. Definition and formula
An interactive applet and associated web page that demonstrate the area of a square. The applet shows a square with all vertices draggable. As you drag any one, the area id continuously calculated and shown on the applet. The square is filled with a unit grid to allow class estimation of area. The displayed ...
Author(s): John Page

Area of a trapezoid. Definition and formula
A web page and interactive applet showing the ways to calculate the area of a trapezoid. The user can drag the vertices of the trapezoid and the other points change automatically to ensure it remains a trapezoid. A grid inside the shape allows students to estimate the area visually, then check against ...
Author(s): John Page

Area of a triangle (conventional method)
An interactive applet and associated web page that explain the area of a triangle. The applet shows a triangle that can be reshaped by dragging any vertex. As it changes, the area is continually recalculated using the 'half base times height' method. The triangle has a fixed square grid in its interior ...
Author(s): John Page

Definition of a Square
An interactive applet and associated web page that demonstrate the properties and behavior of a square. The applets shows a square with all vertices draggable. As you drag any one, the others move to ensure the figure remains a square. It can be seen that the sides remain parallel and congruent, and ...
Author(s): John Page

Intersecting Secant Theorem
An interactive applet and associated web page that demonstrate the 'Intersecting Secants Theorem'. The applet shows a circle and two secant lines intersecting at a point outside the circle. The secant points and the external point are draggable. As you drag them the secant lines are redrawn and a realtime ...
Author(s): John Page

Median of a triangle
A web page and interactive applet illustrating the medians of a triangle. The applet shows a triangle where the user can drag the vertices to reshape it. As the triangle is being reshaped, the user can see the three median lines tracking the changes, and observe that that all three always intersect ...
Author(s): John Page

Rectangle
A web page and interactive applet showing the definition and properties of a rectangle. The applet shows a rectangle where the user can drag any vertex. The other points then move in such a way that the figure remains a rectangle at all times. A control to hide the details allows a classroom discussion ...
Author(s): John Page