B.4.3—Symmetry of shapes

Understand the symmetry of two- and three-dimensional shapes. Identifying chiral centres from representations is an A2 application.

Use b.4.3—symmetry of shapes to connect the rule to the data and decision in the question.

This matters because b.4.3—symmetry of shapes determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply b.4.3—symmetry of shapes to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: B.4.3—Symmetry of shapes is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.