tape measure The width of a car is normally measured using the term (Track). That is defined as the distance between the center of the wheel on the left and the center of the wheel on the right. That distance is the track but is not the total width of the vehicle. Like the above answer you can find that figure yourself with a tape measure.
Multiple the length by the width by the height
the tool used to find the width of a pencil is a ruler. But use the centimeter side of it for the width only!!
A tape measure, or a measuring pole.
To find the relationship in width and area you can use the formula area/length = width. To find the area of a room you multiple the length by the width.
It depends on what you are measuring the width of. Different units and different tools would be appropriate for a hair, a car or a galaxy.
you need length and width length multiply width = area length + length + width + width = perimeter
millimetres
Use a ruler, to find out the area do width times length.
You would use meters.
centimeters
leanth times width
meter