Regarding reasoning with relationships, the
majority of candidates focused on a single figure’s
parts and calculated the perimeter and area of each
pasture separately, using formulas. However, they
failed to perform a sufficient level of reasoning,
particularly about the circumference-diameter
relationship among all the pastures, but their
thinking was based on operations and formulas.
Some candidates formed new geometric figures
by completing half circles and circles, and some
established connections among the parts in
these figures. Especially for the questions about
calculating the area of a given pasture, the
candidates calculated by making the semicircles
into full circles. For questions about the amount of
fencing required, they expressed the relationship
between the fragments in a pasture via partial
comparisons with the other pastures