Consider the inscribed quadrilateral in the following diagram. What are the relationships between the measures of the angles of an inscribed quadrilateral?

[list=1][br][*]Find the measure of [math]\angle B[/math].[br][*]Find the measure of [math]\angle D[/math].[br][*]What is the relationship between [math]\angle B[/math] and [math]\angle D[/math]?[br][*]Does this same relationship exist between [math]\angle A[/math] and [math]\angle C[/math]?[br][*]State your conclusion.[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.