Khan Academy
Khan Academy: Introduction to the Ellipsis
The ellipsis is used to show a pause in speech or that part of a sentence has been removed.
Khan Academy
Khan Academy: Center & Radii of Ellipses From Equation
In this four-question quiz, find the center and major and minor radius of an ellipse given its equation.
English Plus+
Grammar Slammer: The Ellipsis
This site from Grammar Slammer at English Plus contains information regarding the correct use of the ellipsis. Several examples of the ellipsis in context are provided.
Grammar Tips
Are Those Dots Just for Decoration? Ellipsis Usage
This resource offers a quick explanation of how to use the ellipsis correctly.
University of Illinois
University of Illinois Urbana Champaign: Chickscope Egg Math: Equations for an Ellipse
Investigation and discussion of the way "Pin and string construction," works in producing an ellipse. Works through the corresponding equations in a well-ordered way.
History is Fun
Jan Brett: Geometric Shapes Flashcards Pdf
Print out these colorfully illustrated PDF file pages to practice learning your basic two dimensional geometric shapes. Fold them in half and one side shows the shape while the other side shows the shape with the correct name. Put them...
Math Words
Math words.com: Foci of an Ellipse
The definition for foci for an ellipse is given and the definition for ellipse is given. Also gives a diagram and the equation for an ellipse in standard form.
Math Words
Math words.com: Ellipse
Brief definition for ellipse. The standard form for the equation of an ellipse is given also.
Math Words
Math words.com: Conic Sections
Examples of conic sections are given and the equation for their standard form is also given.
Sophia Learning
Sophia: The Ellipsis Mark: Lesson 4
A screencast introducing an ellipsis and explaining its uses. Followed by a three-question quiz to check for understanding. [4:36]
Sophia Learning
Sophia: The Ellipsis Mark: Lesson 1
A slideshow introduces an ellipsis and explaining its uses. Followed by a three-question quiz to check for understanding.
Sophia Learning
Sophia: Omitting Words From Quotations
This lesson goes over how to alter a quotation by removing word or lines.
National Council of Teachers of Mathematics
The Math Forum: Foci of an Ellipse
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.
Cornell University
Cornell University: Astronomy: Orbital Motion and Kepler's Laws
At this site from the Astronomy Department of Cornell University, Kepler's three laws of planetary motion are stated. There are brief explanations of each, along with links to additional information on related subjects.
Math Words
Math words.com: Vertices, Ellipse
Basic definition for the vertex of an ellipse. Shown in a pictoral example as well.
Other
Ma Ttours Definitions of Ellipse Terms Foci
Basic definitions are given for foci, focus, and other terms related to the focus (foci).