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Activities/Ruler

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Ruler.png

Where to get Ruler

Activity | Source

About Ruler

 

Ruler is a simple collection of measurement tools that are displayed on the screen.

<gallery> File:Ruler-fig1.png|CM and MM scales File:Ruler-fig2.png|CM and MM grid File:Ruler-fig3.png|angles File:Ruler-fig4.png|checkerboard <gallery>

Since the OLPC XO computer has a 200 DPI display, the rulers are quite accurate. One other hardware, where the display resolution is not known, their is a spinner to let the user set the DPI. Ruler saves this value to the Journal, so it need not be set on subsequent uses of the Activity.


Filing bug reports

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