[size=150]1) Use the POLYGON [icon]/images/ggb/toolbar/mode_polygon.png[/icon] tool to construct pentagon [i]ABCDE[/i]. [br]2) Select the ANGLE [icon]/images/ggb/toolbar/mode_angle.png[/icon] tool. Then click anywhere inside the polygon. [br]3) Go to the Algebra view (click calculator icon upper left). [br][br]4) Calculate the[b] sum of the measures of the interior angles of this pentagon[/b], making [br] sure to add the Greek letters (and not single numerical values)! If you forget how to do this, [br] [url=https://youtu.be/v2tYFqcShSg]click here to see it again in the context of a triangle[/url]. [/size]
[size=150]Select the MOVE [icon]/images/ggb/toolbar/mode_move.png[/icon] tool in the app above. Move any one (or more) of the triangle's vertices around. What can we conclude about the [b]sum of the measures of the interior angles[/b] of any pentagon? [/size]
[size=150]Select the MOVE [icon]/images/ggb/toolbar/mode_move.png[/icon] tool. Move any one (or more) of the triangle's vertices around. [br]What can we conclude about the [b]exterior angles[/b] of this pentagon? [i]Be specific in your response. [/i][/size]