AnSWErS to tHE StudEnt'S Book ExErCiSES - Hodder Plus Home

7 a) A rotation of 90° anticlockwise about theoriginb) A rotation of 180° about (1, 0)c) A rotation of 90° clockwise about (1, 2)8 a) A rotation of 90° clockwise about theoriginb) A rotation of 180° about (2, 1)c) A rotation of 90° anticlockwise about (1, 1)9 A rotation of 150° clockwise about O10 a) A reflection in the line x 5 0b) A rotation of 90° anticlockwise about (2, 4)c) A reflection in the line y 5 xd) A rotation of 90° anticlockwise about theorigine) A reflection in the line y 5 2xExercise 28.3 (page 377)12y65B4A32C1D2 101 2 3 4 5 6x12Cy654D3212A2 10 1 2 3 4 5 6x13 a) A translation by vector (221)b) A translation by vector ( 2122)c) A translation by vector ( 22 1)d) A translation by vector ( 24 2)B4 a) A translation by vector ( 25 2)b) A rotation of 90° anticlockwise about theoriginc) A rotation of 90° clockwise about (2, 2)d) A translation by vector ( 2324)e) A reflection in the line y 5 0f) A reflection in the line y 5 xg) A translation by vector2(26)h) A rotation of 180° about (0, 2)Exercise 28.4 (page 381)1 a), b)y654321B0 1 2 3 4 5 6xc) An enlargement with scale factor 2, centrethe origin2 a), b) y87A654B32C10 1 2 3 4 5 6 7 8xc) An enlargement with scale factor 3, centre(1, 2)3 a), b) y87B6543A210 1 2 3 4 5 6 7 8xc) An enlargement with scale factor 1_4 , centrethe origin4 a), b) y87654321CAAB0 1 2 3 4 5 6 7 8c) An enlargement with scale factor 2_3 , centre(2, 1)5 a) An enlargement with scale factor 2, centre(0, 3)b) An enlargement with scale factor 1_2 , centre(0, 3)c) An enlargement with scale factor 11_2 , centrethe origind) An enlargement with scale factor 2_3 , centrethe originx222Answers to the Student’s Book exercisesHigher WJEC GCSE Mathematics © 2010, Hodder Education