The meter.
we don't use length. we use liter.
I would use a centimetre to measure the length of a boy. Not sure what a boy yard is, though.
A metre.
To measure a length(one dimensional) of something we can use meters.
You should use a meter stick to measure the length of a soccer pitch.
The base unit of length is the metre. You would use metres to measure a park. A Rugby pitch is roughly 100 metres long by 70 metres wide.
You could measure a field by using tools such as a measuring tape or surveying equipment to calculate its length and width. Then, multiply the length by the width to determine the area of the field in square units.
Yards
The meter.
Metres
Usually, you would use kilometers.
Lenght of osu football field is generally measured in square meters.
You can measure the width of a park in meters or feet.
Length would be the most appropriate unit of measurement
we don't use length. we use liter.
To measure the length and width of a paramecium in microns using a 40x magnification microscope, you can use a calibrated eyepiece graticule or stage micrometer to determine the field of view in microns at that magnification. Then, you can measure the paramecium by counting the number of microns it spans across using the field of view as a reference. This will allow you to estimate the length and width of the paramecium in microns.