Constructions as Art
by jensilvermath • September 8, 2013 • Math • 2 Comments
The pentagon…
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GeoGebra – Big Picture
by jensilvermath • August 7, 2013 • Math • 0 Comments
This is a GeoGebra Screen with all of the Views open. You will not be using them all at once, so don’t panic! The first panel is a Computer Algebra System (CAS); I haven’t used that too much yet. The second panel is the Algebra view. This displays names, values, equations, etc. of everything...
Read more →Matrix Transformations in GeoGebra
by jensilvermath • August 6, 2013 • Math • 1 Comment
Last weekend I had the great pleasure of learning about matrix transformations in GeoGebra from the incomparable Todd Edwards! He was one of the organizers, along with Steve Phelps, of the 2013 North American GeoGebra Conference, held on the beautiful Miami University campus, in Oxford, OH. (I’ll write more about that soon.) On our...
Read more →Volumes of Platonic Solids (Teaser)
by jensilvermath • July 30, 2013 • Math • 0 Comments
Preparing for teaching volume and surface area of spheres led me to this thought. Can we demonstrate that the volumes of Platonic solids approach that of a sphere? Hmn, I made more nets and spent another weekend cutting, folding, and gluing.
Read more →Revisiting London & the Golden Ratio
by jensilvermath • July 30, 2013 • Math, Radian Protractors, Teacherpreneur • 0 Comments
I have been revisiting these topics as a launch to trigonometry, and I am once again amazed. Two years ago, in London, I stayed in a hotel designed around Fibonacci Numbers and the Golden Ratio. The reception staff did not quite understand the math (though Francesca and Antonio were charming “hosts”), so, upon my...
Read more →3-4-5 Sierpinski
by jensilvermath • July 30, 2013 • Math • 0 Comments
Here’s a cool motivator for studying fractals, similar figures, the Pythagorean Theorem, exponential functions, etc…
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