Determine This

Give a Reason / Justify

Afrikaans: Gee 'n rede / Motiveer

State the specific theorem, axiom, or rule that justifies your answer. In Euclidean Geometry this means naming the exact theorem (e.g. 'angles in the same segment are equal'), not repeating the calculation.

Common mistake

Writing a calculation or restating the answer instead of naming the geometric reason.

Signal phrases

  • Give a reason for your answer
  • Justify your statement

Past paper examples

Give a reason why ∠ABC = ∠ADC.

Source: DBE Mathematics Paper 2, November 2023, Question 9.1.2

Where this comes up