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'mm' millimetres is a measure of length.

1 sq. mtr' is a measure of area.

However, there are 1000 mm in 1 metre.

So in 1 m^2 there are 1000mm X 1000 mm = 1,000,000 mm^2

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lenpollock

Lvl 16
1y ago

What else can I help you with?