ATC Wednesday Webinar

Steve Phelps, 2015年9月16日

Spherical Geometry Webinar


  • 1. A Great Circle
  • 2. Question 2: Vertical Angle Theorem
  • 3. Antipodal Points
  • 4. Question 4: Non-collinear Points
  • 5. A Trirectangular Triangle
  • 6. A Birectangular Triangle
  • 7. Question 8: A Single Right Angle
  • 8. Question 8: A Spherical Right Triangle
  • 9. Angle Between Longitude and Latitude

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A Great Circle

Notice that... [br][br]A great circle divides a sphere in two congruence hemispheres, just as a line divides a plane into two congruent half planes.
A Great Circle
– Steve Phelps

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