Tangent - Chord

How to Use this Applet

The Graph Area

• Drag any highlighted location on the circle ( • ) to move that location along the circle.
• Drag any non-highlighted location on the circle to change the radius of the circle.
• Drag the center of the circle ( • ) to re-position the circle.
• <SHIFT>+drag the center of the circle ( • ) to re-position the circle horizontally or vertically.

Other

• Use the "RESET" button to restore the applet to the initial state.