This downloadable java simulation models the 2D energy eigenstates of a particle trapped in a very deep two-dimensional circular well.

This site from the University of Saint Andrews shows the involute of a circle graphically and gives brief history. Cartesian equation is given.

This site, which is provided for by the University of St. Andrews, allows you to zoom in/out and add evolutes, involutes, etc.

Use the fact that the arc measures of a circle must sum to 360 degrees to find missing arc measures by setting up equations. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or...

In this interactive physics tutorial, students explore the variety of mathematical equations that describe the motion of satellites.

Gain an understanding of how to find the diameter of a circle by viewing an example and a video lesson. [1:01]

[Free Registration/Login may be required to access all resource tools.] This lesson covers changing a general second-degree equation into the standard form of a parabola, ellipse, circle or hyperbola. Students examine guided notes,...

The mathematics associated with the motion of satellites is described. Equations (for period, velocity, acceleration and force) are stated, symbols described, and sample problems solved. Includes five practice problems with solutions and...

In Spanish. In this interactive activity you will get a clear understanding of the definition the circumference of a circle and have fun while learning the relationship between equations and figures.

This site offers a problem and solution to finding all possible slopes for a line tangent to a circle given a particular equation of a circle. Could be an interesting challenge for students.

Use this circle calculator to find the area, circumference, radius, or diameter of a circle. Given any one variable A, C, r or d of a circle you can calculate the other three unknowns.

This site offers a discussion on polar coordinates. The discussion is an introduction to the concept and is in very simple terms. The site could also be used a s a review, as the fundamentals of polar graphing is easily found.

Dr. Math, in reply to a student question, shows how a specific pair of parametric equations produces a circle as opposed to an ellipse.

Find the center and radius of a circle given the equation in expanded form.

Find the center and radius of a circle given the equation in standard form.

This Learn Check file is a review of writing conic sections given the graph of a conic section. Students are asked to use the graphs to write the equations for a ellipse, circle, parabola, and hyperbola.

Students will learn about the equation for a circle by using a Study Cards stack. Later, students will attempt to match the graph of a circle from a digital picture, using the form learned previously, and approximating the center and...

Gives brief description and standard equations for the four conic sections. Includes pictures, examples, and practice problems.

Read a short explanation of parametric equations and how they differ from other kinds. Also provides a diagram and a bibliography.

Hotmath provides 26 practice problems relating to conic sections. Each of the practice problems include a step-by-step guide for solving their conic.

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 provides descriptions and helpful hints regarding conic sections - circles, parabolas, ellipses, and hyperbolas. Content also includes interactive problem solvers complete with a full analysis of the math behind the answer.

Introduces the basics of conics in algebra, including a flow-chart for determining which sort of conic is represented by a given equation.

Students will compare the number of circles in two boxes. If they are equal, they will write a number sentence. Explanations and examples are included.