Can an area with the same coverage rate as 1m2 be referred to as a square metre even if it's not 1mx1m?

Went to buy some lawn at weekend and had a disagreement with my husband, when we asked the bloke in the shop how big the peices of turf were he said 1metre square, but they weren't square! I get that it would have had the same coverage rate as 1m x 1m but can it officially be called a square metre if it... show more Went to buy some lawn at weekend and had a disagreement with my husband, when we asked the bloke in the shop how big the peices of turf were he said 1metre square, but they weren't square! I get that it would have had the same coverage rate as 1m x 1m but can it officially be called a square metre if it doesn't measure 1m x 1m?
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