[color=#000000]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 octagon's vertices each time [i]before[/i] you drag the slider![/color]
[b]Determine the sum of the measures of the interior angles of this octagon[/b].
What is the [b]sum of the measures of the exterior angles [/b]of this octagon?