This question and answer site deals with finding the diameter of one end of a frustum of a cone when you know the diameter and angle of the end as well as the length of the cone.

Various forms of equations of circles are presented at the Math Forum: center-radius form, general form, diameter form, three-point form, and parametric form.

This site contains a vast amount of information relating to the hyperbola, including the definition of a hyperbola, equations in various systems, including polar, and many important characteristics of hyperbolas. Site also provides many...

Dr. Math, in response to a student question, provides insight into degenerate cases of conic sections.

The question, "If the major and minor axis of an ellipse are given, how do I find the focus points?" is answered at the Math Forum.

This site from the Richland Community College provides the detailed lecture notes to a college algebra course, complete with equations and definitions. Content ranges from "functions and their graphs" to "conics and parametric equations."

An explanation for the focus in conic sections along with diagrams. Site provides graphs, references, and a brief bibliography and citation.

Learn about the three ways to define a parabola: Focus and Directrix, The Graph of a Function, and As a Conic Section. Examples are provided.

This is an excellent site on parabolas. Examples and formulas are given.

This is a site for students and teachers of all grade levels. If you are looking for math tables, general information about math topics, or you would like to ask a question, this is the site to visit.

The University of Saskatchewan's Department of Mathematics and Statistics provides high school students with online tutorials and exercises on what they deem some of the most important topics in geometry: Triangles, and Circles and Other...

This site from Mathworld provides a wealth of information about circles is presented. The information ranges from the basics--radius, circumference, etc.--to advanced concepts--equations in polar and pedal coordinates, etc.

This site gives a student a hint of how to determine the equation of a parabola when given three points on the parabola. The Dr. only hints at the solution, encouraging thinking on behalf of the student.

A brief definition of what degenerate conic sections are along with a picture.

This site explain ellipse how they are formed with the foci, and gives a nice moving demonstration of drawing an ellipse. Read further down the page to equations of ellipses in different systems, including polar. The last half of the...

A proof to show that the square root of two is an irrational number, followed by a shorter and even more beautiful proof.

A complete reference guide to an ellipse. It provides definitions, examples, and an interactive activity that enhances further explanation. Includes links to related topics.

WebMath offers a java applet that allows you to input information about an ellipse, in one of four forms, and gives you the graph of the ellipse.

Mathematics Encyclopedia provides an introduction to conics. A picture of each conic, the definition, and a brief discussion about the standard form of conic equations are given, along with encouragement to master conics "because they...

Mathematics Encyclopedia provides an introduction to conics. A picture of each conic, the definition, and a brief discussion about the standard form of conic equations are given, along with encouragement to master conics "because they...

Mathematics Encyclopedia provides an introduction to conics. A picture of each conic, the definition, and a brief discussion about the standard form of conic equations are given, along with encouragement to master conics "because they...

Mathematics Encyclopedia provides an introduction to conics. A picture of each conic, the definition, and a brief discussion about the standard form of conic equations are given, along with encouragement to master conics "because they...

Mathematics Encyclopedia provides an introduction to conics. A picture of each conic, the definition, and a brief discussion about the standard form of conic equations are given, along with encouragement to master conics "because they...

Mathematics Encyclopedia provides an introduction to conics. A picture of each conic, the definition, and a brief discussion about the standard form of conic equations are given, along with encouragement to master conics "because they...