Month: August 2011

GeoGebra 4.0 Sneak Peek 8: The Probability Calculator

GeoGebra

This is the eighth part of the GeoGebra 4.0 Sneak Peek Series.

Another significant addition to GeoGebra 4.0 is the Probability Calculator.  The Probability Calculator is is used for visualizing probability distributions and computing probabilities from these distributions.

The probability calculator supports distributions like Chi-Squared, Binomial, Poisson, Hypergeometric,  and more.

One comment , , ,

Paper Folding: Extracting the cube root of a number

High School Algebra, High School Geometry, High School Mathematics

In the previous post on paper folding, we have learned how to use paper folding to extract the square root of a number on the number line. In this post, we are going to learn how to extract the cube root a number by paper folding. The steps in constructing the fold is very similar to extracting the square root.

Paper Folding Instructions 

  1. Get a rectangular piece of paper and fold it in the middle, horizontally and vertically, and let the creases (see green segments in the applet) represent the coordinate axes.
  2. Let M denote (0,1) and let R denote (-r,0).
  3. Make a single fold that places M on y = -1 and R on x=r.
  4. The x-intercept of the fold is \sqrt[3]{r}.
The GeoGebra applet below visualizes the fold. Drag points P and Q to satisfy the conditions above. Note that you can also move point R.  » Read more
2 comments , , , , ,
1 … 8 9 10 11