Point  Circle
How to Use this Applet
The Graph Area
 Drag any highlighted location on the circle ( • ) to move that location along the circle.
 Drag the center of the circle ( • ) to reposition the circle.
 <SHIFT>+drag the center of the circle ( • ) to reposition the circle horizontally or vertically.
 Drag the other highlighted location ( • ) to adjust/change the tangent(s) (outside the circle) or the chord (inside the circle).
 <SHIFT>+drag the other highlighted location ( • ) to adjust/change the tangent(s) (outside the circle) or the chord (inside the circle). The determining location can be moved horizontally of vertically.
 Drag any nonhighlighted location on the circle to change the radius of the circle.
Other
 Use the "RESET" button to restore the applet to the initial state.
