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«Geometry Expressions Manual TM Saltire Software PO Box 230755 Tigard, OR 97281 0755 © 2013 Saltire Software. All rights reserved. Information in ...»

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You can configure the X and Y axes in many ways. There are the usual attributes of lines and text.

Show Labels - is useful when the axis labels lie under some part of your diagram making it hard to read. You can turn these off on one or both axes with the attribute set to False.

Units - can be set to the usual decimal, but with trig functions you may find the Degrees, Radians or Radians/3 units more appropriate. If you use the Degrees or Radians units in trig functions, don't forget to set your Angle Mode to Radians on the status bar.

© 2013 Saltire Software 202 Geometry Expressions Manual Visibility Condition You can set any mathematical condition for one or more object's visibility.

Use this with the Animation tools for some great effects. Here are the


1. Select the object(s) that you want to change visibility.

2. Right-click and select Visibility Condition from the Selection Context menu.

3. Enter the expression for a defined variable for which you would like

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Here's an example. Point C is t proportional along the parabola. In the first figure the picture is hidden. When the picture was visible, we set the it's Visibility Condition to: |t| =0 AND |t|.3. With the Animation tools we set t from -1.5 to 1.5. As point C approaches the top of the arc, BOOM!

Tool Bar The icons across the top of the screen make some of the routine tasks in the File, Edit, and View menus, and Help easily accessible.

- See The Selection Arrow for more information.

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© 2013 Saltire Software X More About Geometry Expressions 206 Geometry Expressions Manual What's New in Geometry Expressions?

Our JavaScript Apps, Lua Apps and Dashboard Widget generation capabilities were so popular, we added several new features.

There are new Input controls for variables · Advance Button lets you increment a variable · Media Button gives you more controls to change the variable · Random generates a random value within your specified range · Time is handy for making clock apps and other animated apps Outputs can now be attached to a Show / Hide Button. This feature combined with the Random input type is very handy for making practice Apps where students can check their answers by clicking an answer button, then reload the page with a new problem.

A new feature in Geometry Expressions that caries over into any generated Applet is the Visibility Condition which lets you show any object under a mathematical condition.

Now you are not limited to only one of Constraints, Annotations, or Calculations on a single object. If you like, you can have all three! So, for example, you could have an angle annotation on the supplementary angle of a constrained angle.

Other new features include:

· a new export file format, Scalable Vector Graphics (.svg) · two new Built-In Functions - ceil() and floor(), a handy way to convert a value to an integer.

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Where is the Geometry Expressions Website?

Information on upgrades, additional technical support and loads of great

examples can be found on the Geometry Expressions website at:


Can I See Some Examples?

Yes! We're on YouTube!

You can also sign up for a live Webinar. Send us a note and we'll get back to you with a date and time.

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-Ttangents 88, 101 text 57

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