Consider the inscribed quadrilateral below. Do the relationships discovered between the angles in Example 1 still hold for the angles in this quadrilateral?
[list=1] [*]Calculate the measures of all four angles of quadrilateral [math]ABCE[/math]. [*]Find the sum of the measures of [math]\angle A[/math] and [math]\angle C[/math]. [*]State your conclusion. [/list]