How did they make a meter?

Answer 1

first. they put the raw materials in the factory and then they do it step by step/ :))

Answer 2

The meter was originally defined as one ten-millionth of the distance from the equator to the North Pole along a meridian passing through Paris. This definition was later updated using the speed of light. Today, the meter is defined as the distance that light travels in a vacuum in 1/299,792,458 of a second.