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FP1 matrix question watch

1. i hope this photo is clear.
in the case of part B, what is the difference between BT=T' and TB = T'?
and what does it mean for each one?
2. When transforming vertices of a shape, represented by a matrix, say T, where the vertices are given in columns,you have to pre multiply T by the transformation matrix B to get the transformed shape.
You could represent the vertices in a matrix where the vertices are given in rows not columns and in this case you would post multiply by the transformation matrix B.
Hope this makes some sense.

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Updated: April 13, 2016
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