Millimeter (abbreviated as mm) is one of the smaller length units in the international standard unit system, which is especially suitable for measuring small objects or distances. 1mm is equal to 0.00 1mm, so it is one thousandth of the meter (m). Millimeter is often used to measure the thickness of paper, the diameter of objects, the thickness of lines and other measurements that require high precision. It is usually used in the fields of science, engineering, architecture and manufacturing.
A unit of measurement in mathematics
1, length unit: meter (m) is an international standard length unit, which is used to measure distance, size, area and volume. It is widely used in geometry, algebra and physics. One centimeter (cm) is one hundredth of a meter and is usually used to indicate smaller lengths, such as the size of paper and the diameter of objects. Millimeter (mm) is one thousandth of a meter and is used to measure very small lengths.
2. Mass unit: kilogram (kg) is an international standard mass unit, which is used to express the mass of an object. It is often used in physics, engineering and calculation. Gram (g) is a part of a kilogram, which is used to represent a smaller mass, such as the weight of food. A milligram (mg) is one thousandth of a gram and is used to measure very small masses, such as the dose of a drug.
3. Time unit: second (s) is the international standard time unit, which is used to indicate the time interval. In physics, mathematics and engineering, it is often used to measure time. Minute (min) is one sixtieth of an hour, which is used to indicate a relatively short time, such as the duration of a meeting. Hour (h) is a quarter of a day, which is used to represent a long time, such as travel time or working time.
4. Angle unit: degree (0) is usually used to represent the plane angle, and a circle has 360 degrees. Widely used in geometry and trigonometry. The radian (rad) is another unit used to express the angle, which is usually used in advanced mathematics and physics. A circle has a radian of 2π.