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GeoGebraGeoGebra Lesson

Sum of Interior Angles of a Polygon

Investigate the sum of the angle measures of a polygon with any number of sides.

Aufgabe 1

Putting It All Together

Answer these open ended questions on your own or with others to form deeper math connections.

Aufgabe 2

What is the sum of the measures of three angles in a triangle?

Aufgabe 3

What do you think the sum of the measures of the angles in a 10-sided polygon would be?  Explain.

Aufgabe 4

How would you find the sum of the measures of the angles of a 100-sided polygon?