The purpose of this applet is to allow the user to change the size of a circle's diameter and look for a relationship between the length of any circle's diameter and its circumference. Drag Point B to different places and record your findings.

If you know a circle's diameter how can you predict its circumference?[br][br]If you know a circle's radius how can you predict its circumference?[br][br]If you know a circle's circumference how can you predict it diameter or radius?