median
don steward
mathematics teaching 10 ~ 16

Thursday, 17 August 2017

quadrilaterals on a 3 by 3 dotty grid

almost an antique
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 (1) claims there are a total of 94 different positions
counting translations, reflections or rotations

an intention might be that students don't count transformations of each shape (initially anyway)




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