A-LevelComputer ScienceProgramming9618/22 · May/June 2024 · 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.
- Write pseudocode for the procedure IsRA().[5]
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Mark scheme
Marking points from the official mark scheme (May/June 2024). The mark or mark type is shown in brackets.
- [5] Mark as follows:
- 1. Procedure heading and ending and declaration of all variables used
- 2. Appropriate prompt and input for each length
- 3. One correct length test
- 4. All three length tests // selection of which test is required
- 5. Output one of two messages following a reasonable attempt at MP3
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