Worksheets · Foundation and Higher

Reflections, rotations and translations

3 exam-style questions. Answers and the mark for each step are on the last page.

  1. Question 1Non-calculator · 3 marks

    This question is about translations.

    (a) The point A(2,5)A(2, 5) is translated to the point A′(6,1)A'(6, 1). Write down the column vector of the translation. (1)

    (b) The point B(−3,2)B(-3, 2) is translated by the vector (−25)\begin{pmatrix} -2 \\ 5 \end{pmatrix}. Write down the coordinates of the image of BB. (1)

    (c) Write down the column vector that translates A′A' back to AA. (1)

  2. Question 2Non-calculator · 4 marks

    Point A is (2,−1)(2,-1). It is reflected in the line x = −1.

    (a) Find the coordinates of the image B. (2)

    (b) Find the translation vector mapping A to B. (2)

  3. Question 3Non-calculator · 5 marks

    This question is about reflections.

    (a) The point P(0,6)P(0, 6) is reflected in the line LL. Its image is P′(4,2)P'(4, 2). Find an equation of the line LL. (3)

    (b) Triangle TT has vertices (2,1)(2, 1), (5,1)(5, 1) and (5,3)(5, 3). Triangle UU has vertices (−1,−2)(-1, -2), (−1,−5)(-1, -5) and (−3,−5)(-3, -5). Describe fully the single transformation that maps TT onto UU. (2)

Answers and marks

Question 1

(a) (4−4)\begin{pmatrix} 4 \\ -4 \end{pmatrix}

  • B1 The vector (4,−4)(4, -4) written as a column.

(b) (−5,7)(-5, 7)

  • B1 The image (−5,7)(-5, 7).

(c) (−44)\begin{pmatrix} -4 \\ 4 \end{pmatrix}

  • B1 The vector (−4,4)(-4, 4).

Question 2

(a) (−4,−1)(-4,-1)

  • M1 The x-coordinates are equally far from the mirror line.
  • A1 Correct answer: (−4,−1)(-4,-1)

(b) (−6,0)(-6,0)

  • M1 Subtract original coordinates from image coordinates.
  • A1 Correct answer: (−6,0)(-6,0)

Question 3

(a) y=x+2y = x + 2

  • P1 Finding the midpoint (2,4)(2, 4).
  • P1 Using a gradient of 1, perpendicular to PP′PP'.
  • A1 y=x+2y = x + 2 or any equivalent.

(b) Reflection in the line y=−xy = -x

  • B1 Naming a reflection.
  • B1 The mirror line y=−xy = -x.

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Reflections, rotations and translations

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Independent practice for Pearson Edexcel GCSE Mathematics (1MA1), not endorsed by Pearson.

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