## Geometer’s Sketchpad Sketches at Sketch Exchange Before I became a GeoGebra user, I used The Geometer’s Sketchpad. I migrated to GeoGebra because aside from it is free, it is more friendly to students. Geometer’s Sketchpad requires a little mathematical maturity and knowledge of geometric constructions. I still like Geometer’s Sketchpad,  GeoGebra is getting and better. Last month, I have shared to you more than 12000 free dynamic applets from GeoGebraTube and more than a year ago, I have also mentioned more than 7000 demonstrations from Wolfram. To add to the list of dynamic geometry resources, The Geometer’s Sketchpad has also created its library of “sketches” in Sketch Exchange.  Sketch Exchange as of this writing has more than 500 sketches available.  Just like GeoGebraTube and Wolfram Demonstrations, it is a place where GSP users can share sketches, tips, and tutorials.

Most of the sketches in Sketch Exchange requires Geometer’s Sketchpad 5.05, a free upgrade if you have Sketchpad 5.

## Geometer’s Sketchpad Essentials 8 – Rotating Geometric Objects

This is the eighth tutorial in the Geometer’s Sketchpad Essentials Series.  In this post we are going to learn the Rotate command. First we are going to create a triangle and name it ABC, create a center of rotation point D, and then rotate a triangle 90 degrees. The output of this tutorial is shown in the first figure. » Read more

## Geometer’s Sketchpad Essentials 7 – Translating Geometric Objects

This is the sixth part of the Geometer’s Sketchpad Tutorial Series.  In this post, we are going to learn how to use the Translate command.   First, we are going to make a translation vector using two points A and B, where A is the initial and B is the terminal point. We are going to construct a triangle and translate it using vector AB. Instructions

1. Using the Point tool construct two points and use the Text tool to reveal their names. Be sure that they are named  A and B. » Read more

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