Higher November 2022 Paper 3 Q12
12 Triangles ABC and DEF are shown on a grid.
Describe a single transformation that shows the triangles are congruent. [2 marks]
| Answer | Mark | Comments |
|---|---|---|
| Alternative method 1: ABC to DEF | ||
| Translation and \(\begin{pmatrix} 6 \\ 4 \end{pmatrix}\) or 6 right and 4 up | B2 | B1 translation or \(\begin{pmatrix} 6 \\ 4 \end{pmatrix}\) or 6 right and 4 up |
| Alternative method 2: DEF to ABC | ||
| Translation and \(\begin{pmatrix} -6 \\ -4 \end{pmatrix}\) or 6 left and 4 down | B2 | B1 translation or \(\begin{pmatrix} -6 \\ -4 \end{pmatrix}\) or 6 left and 4 down |
Additional guidance
| Do not accept ‘across’ for left or right | |
| Do not accept (6, 4) or \(\begin{pmatrix} 3 \\ 2 \end{pmatrix}\) | |
| Do not accept any contradicting description and vector for B2 or B1 | |
| Ignore fraction line shown in a correct vector | |
| Accept the vector implied by addition to each coordinate oe eg Translation and \(A\) to \(D \to\ -4 + 6 = 2\) and \(1 + 4 = 5\) \(B\) to \(E \to\ -5 + 6 = 1\) and \(-3 + 4 = 1\) \(C\) to \(F \to\ -2 + 6 = 4\) and \(-3 + 4 = 1\) | B2 |
| More than one transformation used | B0 |