Dilating a triangle

This applet allows users to experiment with similar triangle constructed by a dilation. Relevant lengths are measured automatically, and relevant ratios are automatically calculated in the spreadsheet. Negative scale factors are possible, too. This applet shows the correct behavior: the - sign makes everything "backwards" (and what does that mean?). The size (absolute value) of the scale factors determines the amount of stretching or shrinking.


Susan Addington

Target Group (Age)
10 – 19+
© 2018 International GeoGebra Institute