Sophia Learning
Sophia: Ellipse: Lesson 1
During this lesson, the fact that an ellipse is the set of all points, the sum of whose distance from two fixed points is a constant is discussed. It is 1 of 6 in the series titled "Ellipse."
Sophia Learning
Sophia: Ellipse
During this lesson, the fact that an ellipse is the set of all points, the sum of whose distance from two fixed points is a constant is discussed.
University of Oregon
Electronic Universe: Kepler's Laws of Planetary Motion
From the The Electronic Universe Project web site. This page states and explains Kepler's three laws of planetary motion. Includes some downloadable movie clips and associated sound files. Discusses Ptolemy's attempt to explain...
Sophia Learning
Sophia: Omitting Words From Quotations: Lesson 1
This video lesson goes over how to alter a quotation by removing word or lines. It is 1 of 4 in the series titled "Omitting Words from Quotations." [5:17]