Sum of Interior Angles of Polygones
Eda Nur Sezer
Look at the relation between sum of angles and number of sides of polygons.
Change n and look at changes in interior angles.
After first step, now look at changes in sum of interior angles.
Finally, try to discover proper formula in order to find sum of interior angles of polygons.
Population of South Korea (1900-2010)
Construct a 90 degree angle
Transformations - fa(x)