Sum of Angles in a Regular Polygon on the Casio ClassPad 
Use the ClassPad regular n-gon feature to create a
sequence of regular polygons, starting with an equilateral triangle.
Create a sequence() call with the number of sides in
the first list and the total sum of the angles in the second:
Use the resulting linear equation to predict the size
of the angles of a regular heptagon. Confirm by creating one in geometry.
Interpret the slope and intercept of the equation in
terms of the drawing below:
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