Wednesday, September 7 to Sunday, September 11

Topics:

Perpendicular lines and parallel lines V 0.6 and K1 1.2, 1.11
Similar trianglesV 0.8 and K1 3.2 (plus Euclid’s Elements Book VI Proposition 4 here)

Homework 1: due Monday, September 12

Homework 2: due Monday, September 19

OpenLab: due Sunday, September 11

  • none

Other:

  • Start playing around with Geogebra.
    • To use the browser app, click Start Calculator. You can view the geometry tools by clicking on the little triangle and circle icon on the left side of the screen.
    • Download the Geometry and Classic 6 apps from the download page and play around to see which one you like better.
    • Read Venema 1.1, 1.2, and 1.3 to guide your play.

Resources:

  • Proof that similar triangles have proportional sides in Euclid’s Elements here

Coming up next week:

Similar triangles (continued)V 0.8 and K1 3.2 (plus Euclid’s Elements Book VI Proposition 4 here)
Area & Pythagorean theoremV 0.11 and K1 5.1, 5.3, 5.4, 5.5
Quadrilaterals & polygonsV 0.9 and K1 1.12, 1.13, 3.3