Example of misconception:
Given the problem, “Find the size of each interior angle of a regular polygon with 5 sides.” students may automatically calculate the sum of angles in a polygon and since they are unawareof the fact that a regular pentagon means 5 equal sides and 5 equal angles, they are unable to proceed. Some students may actually divide the sum of the angles by since it seems the logical thing to do. However, if given an irregular polygon they may apply the same method.