Dialation
移動搖曳捍，看看三角形放大、縮小了多少？(提示:可把FD的長度除以BC的長度，就可知道答案。)
Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and activated. (
click here to install Java now
)
Law Chi Wai, 15-05-06, ²£¥Í
GeoGebra