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Colophon Colophon

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This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 International License
 1 
creativecommons.org/licenses/by-sa/4.0
. This work may be used for free by any party so long as attribution is given to the author(s) and if the material is modified, the resulting contributions are distributed under the same license as this original.
Most illustrations and embedded interactives were created on either GeoGebra
 2 
geogebra.org
and Polypad by Amplify
 3 
mathigon.org/polypad
and cannot be used commercially without their consent. At the time of this publication, acceptable use policies for these platforms may be found at GeoGebra License
 4 
www.geogebra.org/license
and Amplify Acceptable Use Policy
 5 
amplify.com/acceptable-use-policy
.