[math]\overline{AB}[/math] is tangent to [math]\bigodot{C}[/math] at point [math]B[/math] as shown below. Find the length of [math]\overline{AB}[/math] as well as [math]m\widehat{BD}[/math].

[list=1][br][*]Find the length of [math]\overline{AB}[/math].[br][*]Find [math]m\widehat{BD}[/math].[br][/list][br][br]This applet is provided by Walch Education as supplemental material for their mathematics programs. Visit [url=http://www.walch.com]www.walch.com[/url] for more information.