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This is "Aut4.9.2 - Perimeter on a grid" by White Rose Maths on Vimeo, the home for high quality videos and the people who love them.
This is "Aut4.9.3 - Perimeter of a rectangle" by White Rose Maths on Vimeo, the home for high quality videos and the people who love them.
This is "Aut4.9.4 - Perimeter of rectilinear shapes" by White Rose Maths on Vimeo, the home for high quality videos and the people who love them.
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