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GeoGebraGeoGebra Classroom

Heptagon Angle Theorems

Interact with the applet below for a few minutes.   Then, answer the questions that follow.   Be sure to change the locations of the heptagon's BIG BLACK VERTICES each time before you drag the slider!!! Note: Each point on a side of this heptagon is a midpoint.
Questions: From your observations, what is the sum of the measures of the interior angles of     any heptagon?