Which is the smallest measure of length: millimeter, centimeter, inches, or miles?
A: centimeter
B: inches
C: miles
D: millimeter
D: millimeter
The smallest measure of length is the millimeter.
The smallest measure of length out of millimeter, centimeter, inches, and miles is the millimeter. To determine the answer, you need to compare the sizes of each unit. Here's how you can do it:
1. Millimeter: A millimeter (mm) is a metric unit of length that is equal to one-thousandth of a meter. To visualize the size of a millimeter, think of the thickness of a credit card or a grain of sand.
2. Centimeter: A centimeter (cm) is also a metric unit of length, but it is larger than a millimeter. There are 10 millimeters in one centimeter. You can think of a centimeter as roughly the width of a small paperclip.
3. Inches: The inch is a unit of length in the United States customary and British imperial systems. It is larger than a centimeter and a millimeter. There are approximately 2.54 centimeters in one inch.
4. Miles: The mile is a unit of length commonly used to measure long distances, such as driving or running distances. It is much larger than a millimeter, centimeter, or inch. There are approximately 1,609.34 meters in one mile.
Comparing the sizes of these units, we can see that the millimeter is the smallest one. Thus, the correct answer is D: millimeter.