Geometry 2009

Geogebra Demonstrations

• 2007-12-12 [Trig] Six Trig Functions Placing the trig functions on the unit circle as line segments
• 2007-12-15 [Trig] Winter Solstice Explore why we have seasons on Earth.  Special Case: Oakland, CA.
  
• 2009-01-21 [Geom] Angles in a Semicircle A look at angles inscribed in a semicircle
• 2009-01-22 [Geom] Perpendicular Bisector An emulated C&S Euclidean construction
• 2009-01-26 [Geom] Geometry Chapter 8-1 stuff (geogebra file)
  
• 2009-01-30 [Trig] General Form of a Sine Wave
• 2009-02-03 [Trig] Plotting Sine and Cosine from a Circle
• 2009-02-03 [Functions] Adding two functions point by point
• 2009-02-06 [Geom] Secant Chord Related Areas
• 2009-02-06 [Algebra] y=mx+b
• 2009-03-24 [Trig] Angle Sum Identities, a geometric approach.
• 2009-03-24 [Trig] Law of Sines, construction
  
• 2009-04-13 [Geom] Similar Rectangles
• 2009-05-27 [Conics] Constructed Hyperbola and Ellipse
• 2009-05-28 [Conics] Very Large Array and Parabolas
• 2009-06-10 [Sequences] Infinite sums of geometric sequences if a_2  = 2
• 2009-10-05 [Geom] Given segments of length 3 4 5 arranged as shown, what is the area of the square with corners A and D?  (Math Club POW2 solution)
• 2009-10-13 [Geometry] Finding the Epicenter of the 1989 San Francisco Bay Area Earthquake (1989-10-17)
• 2009-10-31 [Geometry] The Triangle Inequality
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