[size=200]﻿Try this while you wait... https://ggbm.at/EpztQZ6y[/size]
##### Welcome!
This GeoGebra book contains a small selection of nearly 200 applets written for an open-source middle-school curriculum, authored by Illustrative Mathematics and published by Open Up Resources under a CC-BY license, July, 2017. [br][br]The applets in this book were chosen to share with the participants of #ggbconf2017 because they illustrate the variety of student experiences that can be created using the power of GeoGebra and the collaboration of innovative thinkers. Thanks to the GeoGebra team, especially Stephen Jull and Mike Borcherds, for their unwavering support throughout the project. And thanks to the digital team at IM for bringing new ideas to life. [br][br]More information at https://www.illustrativemathematics.org/curriculum[br]

# Scaling the Mona Lisa

[size=150]In real life, the Mona Lisa measures $2\frac{1}{2}$ feet by $1\frac{3}{4}$ feet. A company that makes office supplies wants to print a scaled copy of the Mona Lisa on the cover of a notebook that measures 11 inches by 9 inches.[list=1][*]What size should they use for the scaled copy of the Mona Lisa on the notebook cover?[/*][*]What is the scale factor from the real painting to its copy on the notebook cover?[/*][*]Discuss your thinking with your partner. Did you use the same scale factor? If not, is one more reasonable than the other?[code]﻿[br][/code][/*][/list][/size]

# Hanger Blocks Example

[br]If a triangle weighs 1 gram, how much does a square weigh?