Instructional Video3:40
Extra Credits

♫ History of Non-Euclidean Geometry: "Postulate 5" - Sean and Dean Kiner - Extra History

9th - 11th
Listen to "Postulate 5," the theme song of our series on the history of Non-Euclidean Geometry! Music by Sean and Dean Kiner: http://bit.ly/23isQfx Learn more about non-Euclidean geometry here:...
Instructional Video2:04
The Royal Institution

Non-Euclidean Geometry of a Sphere - Christmas Lectures with Philip Morrison

9th - 11th
According to Euclidean geometry the angles of a triangle add up to 180 degrees. Philip Morrison shows an example of where this isn't true, and non-Euclidean geometry applies. Watch the full lecture:...
Instructional Video9:54
Extra Credits

The History of Non-Euclidian Geometry - Squaring the Circle - Extra History - #3

9th - 11th
Euclidean geometry eventually found its way back into Europe, inspiring René Descartes to create the Cartesian coordinate system for maps, and Isaac Newton to invent calculus. Both these tools helped humanity understand the world better....
Instructional Video1:02:49
Gresham College

From One to Many Geometries - Professor Raymond Flood

10th - Higher Ed
For 100 years up to the end of the 19th century the study of geometry was completely changed with the development of non-Euclidean geometries and the use of techniques to think of geometries in higher dimensions - a development essential...
Instructional Video11:52
Extra Credits

History of Non-Euclidean Geometry - Lies - Extra History - #6

9th - 11th
You gently corrected out our math mistakes and artistic slip-ups, and we're here to tell you it was all part of Bismarck's plans--er, it's Euclid's fault. Time for another episode of Lies! Support us on Patreon! http://bit.ly/EHPatreon...
Instructional Video
Annenberg Foundation

Annenberg Learner: Mathematics Illuminated: Geometries Beyond Euclid

9th - 10th
Video presentation will help you visualize non-Euclidean geometry, comparing flat space with curved space and how they affect shape. Contains a history of non-Euclidean geometry, detailed discussion of curved vs. flat surfaces, and...
Instructional Video
Khan Academy

Khan Academy: Geometry: Euclid as the Father of Geometry

9th - 10th
Introduction to Euclid, Euclid's Elements, and Euclidean geometry. [8:23]
Instructional Video
Khan Academy

Khan Academy: Mobius Strips: Math Improv: Fruit by the Foot

9th - 10th
Video exploring the concept of a Mobius strip and some of its properties using a Fruit by the Foot.