Student Learning Targets
 Habit 4: I can construct mathematical models.
 Habit 5: I can make strategic use of appropriate tools.
 Triangles 4: I can use special triangles to determine geometrically the values of sine, cosine and tangent for angles of 0, 30,45, 60 and 90 without a calculator.
Opener
 Construct an equilateral triangle using your compass and straightedge. (Hint: No measurements!)
 How can you divide your equilateral triangle into 2 smaller triangles?
Now, let’s do some constructions on GeoGebra.

Equilateral Triangle —> “Special” Triangles
Assignments:
 Handout: Problem Set #5, due Thursday at 3:30 pm.
 Delta Math: Exercises for SLT T3 (Second Chance)
 Finish 100% to earn a 3
 Due by 11:59 pm on Sunday March 3.
 Play with Geogebra and learn something (download from Geogebra.org)
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