In the app below, move the vertices of the shown polygon around. Be sure to explore the triangle, quadrilateral, and pentagon. Then, answer the questions that follow.
According to the app, how would you describe what it means for a polygon to be [color=#ff7700][b]convex[/b][/color]? How would you describe what it means for a polygon to be [color=#1e84cc][b]concave[/b][/color]?
Hint: Take a look at all the measures of the polygon's interior angles!
Is it ever possible for a triangle to be [color=#1e84cc][b]concave[/b][/color]? Why or why not?
Well, take a look at your responses to (1) and (2). What do you think?