part of the South Nottinghamshire Project ('Journey into Maths')
by Alan Bell, David Rooke and Alan Wigley
published by Blackie in 1978
the teacher's guide claims there are a total of 94 different positions
counting translations, reflections or rotations
an intention might be that students do not count transformations of each shape (initially anyway)
i.e. find all the different ones that they can
in which case there are 16
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