What theorem is being dynamically illustrated below? [br](Note: The [color=#ff7700][b]orange points[/b][/color] are [color=#ff7700][b]midpoints.[/b][/color])
[color=#000000][b]Theorem:[/b][/color][br]The sum of the measures of the interior angles of any quadrilateral is always 180(4-2) = 360 degrees.