Stage: 5 Challenge Level: 
See the problem 'The Matrix' for an explanation of how a transformation of the plane is given by a matrix and how you can find the image of a point by multiplying its vector by the matrix of the transformation.
Reflections. Vectors. Matrices. Coordinates. Vector geometry. Matrix transformations. Rotations. Complex numbers. Compound transformations. Maths in STEM.
Published July 2003,August 2003.
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