Use Geogebra to

  • create similar polygons,
  • compare the scale factor of a dilation with the side lengths of the image and preimage
  • compare the scale factor with the ratio of the perimeters
  • compare the scale factor with the ratio of the areas

A written version of the investigation is below.

Similar Polygon Exploration

similar-polygon-perimeter-area-exploration

To see a modified version of this exploration (with check boxes to show/hide the ratios) see https://www.geogebra.org/m/ymm4V3XS