What geometry theorems are dynamically being illustrated in the applet below?[br](Feel free to move the white points anywhere you'd like!)
[b][color=#000000]Theorems:[/color][/b][br]The base angles of an isosceles trapezoid are congruent. [br](Note: There are two pairs of base angles: the [color=#ff00ff][b]pink angles [/b][/color]and the [b][color=#38761d]green angles.[/color][/b]) [br][br]The [color=#1e84cc][b]diagonals[/b][/color] of an isosceles trapezoid [color=#1e84cc][b]are congruent.[/b][/color]