Sagot :
Answer:
METER
Its seven basic units, from which other units are derived, were defined as follows: for length, the metre, defined as the distance traveled by light
METER
Step-by-step explanation:
The meter, symbol m, is the SI unit of length. It is defined by taking the fixed numerical value of the speed of light in vacuum c to be 299 792 458 when expressed in the unit m s-¹, where the second is defined in terms of Δvcs.