Higher November 2018 Paper 2 Q8
8
Triangle P is reflected in the line \(y = -x\) to give triangle Q.
Triangle Q is reflected in the line \(x = -1\) to give triangle R.
Describe fully the single transformation that maps triangle R to triangle P. (3)
| Answer | Mark | Mark scheme |
|---|---|---|
| Rotation \(90^\circ\) anticlockwise centre \((-1, 1)\) | M1 | stating rotation or for showing R [(1,1), \((1, -3)\), \((3, -3)\)] |
| A1 | for rotation of \(90^\circ\) anticlockwise | |
| A1 | for centre \((-1, 1)\) given as a coordinate. |
Additional guidance
Award for a triangle in the correct position without the label R as long as this is the only triangle in lower right quadrant.
Accept rotation of \(270^\circ\) clockwise
Can be given as a coordinate alone.
Do not award A marks if there is evidence of other transformations in the description, or other ambiguity in the answer given.