How to Use Prefixes in GeoGebra

Say you are using the speed of light a lot in your calculations in GeoGebra, and you find it a bit inconvenient to write “299792458 m/s” over and over. Instead, you can assign the prefix c to the value 299792458. Then you can just type c instead of 299792458 in your calculations.

This is why prefixes are so useful. The advantage of prefixes is that you can store any value in GeoGebra, so that you don’t have to type it over and over. It looks good too!

In order to use prefixes in GeoGebra, you have to make them yourself first. You can do this by entering them into the Algebra View. For example, if you want to create a prefix “k” in “kilo” as a value, you can type k = 1000 in Algebra View.

GeoGebra Instruction 1

Open CAS under GeoGebra icon View in GeoGebra icon Menu.

<name of prefix> = <value of prefix>

in Algebra View and press Enter.

The prefixes you make can be found in Algebra View. They can now be used for calculations in CAS, by simply writing the prefix instead of the value assigned to it.

Example 1

Compute 32ML ×11dL and 0.02kg + 3500dg

By applying the instructions above, GeoGebra helps you find the answers quickly, as you can see below:

Screenshot of GeoGebra showing the results of computations with prefixes

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