measuring the Unit Circle

The radius R of the circle is 1.[br][br]The BLUE segment tangent to the circle is h units long.[br]The GREEN segment tangent to the circle is w units long.[br][br]Can you find a geometric way to relate R, h, and w ?[br]Can you find an algebraic way to relate R, h, and w ?[br][br][color=#ff0000][i][b]What questions could / would you put to your class based on this applet ?[/b][/i][/color]
A Balanced Assessment in Mathematics Task

Information: measuring the Unit Circle