Matrix

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Rotation 90° clockwise about O

|  0  1 |

| -1 0 |

1 of 9

Identity matrix

| 1  0 |

| 0  1 |

2 of 9

Reflection in the line y = x

| 0  1 |

| 1  0 |

3 of 9

Reflection in the x-axis

| 1    0 |

| 0  -1 |

4 of 9

Reflection in the y-axis

| -1  0 |

|  0  1 |

5 of 9

Reflection in the line y = -x

|  0 -1 |

| -1  0 |

6 of 9

Rotation 180° about O

| -1  0 |

|  0 -1 |

7 of 9

Rotation 90° anticlockwise about O

| 0 -1 |

| 1  0 |

8 of 9

Enlargement

| m  0 |

| 0  m |

Scale factor is m

9 of 9

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