Matrices

• K 0

  0 K


  Enlargement by scale factor K
• 1 0

  0 -1


  Reflection in x-axis
• -1 0

  0 1


  Reflection in y-axis
• 0 1

  1 0


  Reflection in y=x
• 0 -1

  -1 0


  Reflection in y=-x
• 0 1

  -1 0


  Rotation 90° clockwise
• 0 -1

  1 0

  Rotation 90° anticlockwise
• -1 0

  0 -1


  Rotation 180°
• 1 0

  0 1


  identity matrix