for

Shanti Howard

Assignment 5:

Creating and Using GSP Scripts

Write-Up #5. The write-up for this assignment is to create a file on your home page with links to various GSP scripts you have produced. I anticipate that some of the following list will be included, but that you will also add items to the list as the quarter progresses.

The creation of a personal library of GSP scripts as tools for doing constructions you might use several times is an efficient way to organize and store your work. As we have observed students working on problems in our classes, we have been surprised by the number of times we have seen someone repeat a complete construction. Using a script, for example, to construct the circumcircle 4 times makes more sense than repeating the construction 4 times from scratch on the same figure.

Making a script. The simplest way to make a script in GSP 3.0 is to complete a desired construction, select all (either from the menu or by drawing a box around it), and then going to make script under the Work menu. You may want to annotate the comment section to a) help identify "given" objects for the script and b) to indicate whose script it is.

Using a script. Each script will have a set of given geometric objects. Open a sketch and select the object in the order specified in the givens. Then select Play on the script.

Here is a list of scripts that we think would be worth saving and using in your work with GSP. We are sure you will add to the list as you develop more experience with this application.

GSP Scripts

Centroid

Orthocenter

Circumcenter

Circumcircle

Incenter

Incircle

Medial triangle

Orthocenter, Mid-segment triangle

Orthic triangle

Pedal triangle

Center of Nine point circle

Nine Point Circle

Trisecting a line segment

Equilateral triangle, given a side

Square, given a side

Isosceles triangle, given base and altitude

Triangle Centers (H, G, C, and I)

Triangle Centers with Euler Line

Locus of vertex of a fixed angle that subtends a fixed segment.

Divide a segment AB into two parts that form a golden ratio.