Course:Harris, Fall 07: Diary Week 9

Wed:

• Spherical Exercises:
  • last week's (1, 3-8) are due this week on Friday
  • this week's (12-16) are due next week on Monday
• Spherical Explorations:
  • groups continued work on last week's (Easel, Geometry, Polygons)
  • this week's (Isometry) was handed out
  • all (last week's and this week's) are due this week on Friday

Fri:

• mentioned corrections in #6 and #7 of Spherical Geometry: Isometry Exploration
• groups continued work on all Spherical Explorations (including corrections of ones handed back last time)
• collected last week's Spherical Exercises (1, 3-8)
• since no time to discuss spherical geometry in class yet, this week's Spherical Exercises (12-16) are not due until Wednesday of next week
• the question about AAA in Geometry amounts to this: In a sphere, is it possible (like it is on the plane) to "blow up" a triangle proportionately, keeping all angles the same?