Because if it wasn't, there would be something else that was and then that would be a metre.
Chat with our AI personalities
1000mm in a metre
1 metre = 100cm 2 metres = 200cm 1/2 metre = 50cm 1 metre + 1 metre + 1/2 metre = 250cm 2,500 mm 0.25km
A metre stick is a ruler that is 1 metre long. (A little bit more than 3 feet.)
It is 24/10000 metre = 3/1250 metre.
There are 100 centimetres in one metre. Therefore, one square metre is equal to 1002 = 10000 square centimetres.