Dilation is a technique for creating similar figures.[br][br]Each point is stretched outwards from the center point D by multiplying distances by the scale factor (Outwards if the scale factor is bigger than 1.)[br][br]Move the points A, B, C, D to change the shape of the quadrilateral.[br]Move the center point E to dilate from a different location.[br]Use the slider to change the scale factor.
To understand how dilation produces similar figures, see Dilating a triangle on GeoGebraTube: [url]http://ggbtu.be/m2742017[/url]