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===Meaning===
A [[square]] is a 4 sided shape with all sides the same [[length]] and a [[Right Angle|right angle]] at each vertex.
===References===
====AQA====
:[https://www.amazon.co.uk/gp/product/019835939X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=019835939X&linkCode=as2&tag=nrjc-21&linkId=57e96876985fc39b1a3d8a3e3dc238b6 ''Rectangles, page 275, GCSE Physics; Third Edition, Oxford University Press, AQA '']