A-LevelComputer ScienceProgramming ConstructsMay/June 2024Paper 2 Q45 Marks
A triangle has sides of length A, B and C. [Figure of a triangle with sides A, B, C] In this example, A is the length of the longest side. This triangle is said to be right-angled if the following equation is true: A x A = (B x B) + (C x C) A procedure will be written to check whether three lengths represent a right-angled triangle. The lengths will be input in any sequence. The procedure IsRA () will: • prompt and input three integer values representing the three lengths • test whether the three lengths correspond to the sides of a right-angled triangle • output a suitable message. The length of the longest side may not be the first value input.
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
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