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Circles [electronic resource]

Video; Computer Resource; Online Video; Online
The ancient Pueblo people built round ceremonial chambers at Chaco Canyon to mark the natural cycles of solstice and equinox. Like astronomers today, they knew the circular shape was ideal for tracking the progression of the Earth throughout the year. This program uses ancient structures to help define properties of circles, arcs, chords, secants, and central and inscribed angles. The video explains why the Colosseum is shaped like an ellipse instead of a circle, which would have been easier for the Romans to build. The Pantheon, with its round oculus and circular dome inside an arched ceiling, is also examined.
Release Date
Run Time
30 min.
Access requires authentication through Films on Demand
6 & up
  • Encoded with permission for digital streaming by Films Media Group on October 09, 2011.
  • Films on Demand is distributed by Films Media Group for Films for the Humanities & Sciences, Cambridge Educational, Meridian Education, and Shopware.
Geometry Applications
Geometry applications (New York, N.Y.)
  • Geometry Basics: Circles (3:39)
  • Circular Arcs (2:35)
  • Geometry of the Ellipse (2:09)
  • Circular Arcs (1:54)
  • Elliptical Shape on TI-Nspire (5:58)
  • Tangents (3:20)
  • How to Build a Coliseum Model (1:15)
  • Geometry: Chords (2:11)
  • Exploration of Pantheon on T-Nspire (4:14)
  • Intercepted Arc: Exploration on TI-Nspire (10:01)
  • Credits: Circles (1:05)
New York, N.Y. : Films Media Group, [2011], c2010.
Publisher no.
  • 44695s Films Media Group
  • 44701 Films Media Group
Access Restriction
Access requires authentication through Films on Demand.
1 streaming video file (30 min.) : sd., col., digital file.
Mode of access: Internet.
System requirements: FOD playback platform.
Technical Details
  • Access in Virgo Classic
  • Staff View