Foundation June 2022 Paper 3 Q15
15 In this question, all lengths are in centimetres.
The diagram shows an equilateral triangle and a square.
Not to scale
The perimeter of each shape is 36 cm.
Find the value of \(b\). [4]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| 5 nfww | 4 | B2 for [\(a =\)] 4 or M1 for \(9a = 36\) or better and M1 for showing substitution/use of their \(a\) e.g. \(4 \times\) their \(4 + 4b = 36\) oe or better or [\(b =\)] \(9 -\) their 4 | If another value for \(a\) is used to find \(b\) do not award B2 T&I only scores if ending at 4 Or better may be e.g. \(a + b = 9\) or \(\dfrac{36 - 4 \times \textit{their } 4}{4}\) |