Unravel the mysterious pattern
Do you remember the angle sum of a triangle and the angle sum of a quadrilateral? Expand the sections below to discover the angle sums of other polygons.
The Pentagon is the headquarters of the United States Department of Defence, located in Arlington, Virginia. Let’s explore the angles of this image.
Open the famous pentagon activity, use the protractor to measure each of the interior angles and then find the angle sum.
Open the angle sum of a polygon activity and follow these instructions:

Copy and complete this table:
Number of sides 
Angle sum (degrees) 
3 

4 

5 

6 
What number pattern do you notice in your table?