Interact with the app below for a few minutes. [br]Then, answer the questions that follow. [br][br]Be sure to change the locations of this heptagon's vertices each time [i]before[/i] you drag the slider!
[b]Determine the sum of the measures of the interior angles of this heptagon[/b].
What is the [b]sum of the measures of the exterior angles [/b]of this heptagon?