河川

Refers to a diagonal relationship or position, specifically relating to opposite corners or angles in a geometric shape or a physical space. It is commonly used in mathematics to describe lines connecting non-adjacent vertices, as well as in daily life to describe sitting or standing diagonally across from someone.

The distance from the center of a circle to its outer edge. It is half of the diameter and is used in both mathematical contexts and to describe a physical area around a specific point.

The distance from one side of a circle to the other, passing through the center point. It is a fundamental measurement used in geometry and daily life to describe the size of round objects like plates or pipes.

面積 refers to the measurement of the size of a surface or the amount of space inside a two-dimensional shape. It is commonly used in mathematics, real estate, and geography to describe how much space a flat object or land occupies.

The internal volume or capacity of a container or three-dimensional space. It refers to how much a container can hold, often used in architectural, shipping, or scientific contexts.

The measurement of how heavy an object is, typically expressed in standard units like kilograms or pounds. It is frequently used in technical, industrial, or official contexts such as shipping and manufacturing.

Density refers to the degree to which something is compact or crowded. It can describe physical mass per volume, the concentration of people in an area, or the richness and intensity of time and content.

The degree to which a substance is contained within a solution or mixture, or the depth of color and thickness of a liquid. It is commonly used in scientific, culinary, and environmental contexts to describe how strong or weak a solution is.

Hardness refers to the degree or level of how hard a material is, often measured scientifically. It is commonly used to describe the physical properties of minerals, metals, or the mineral content in water (water hardness).

Temperature refers to the physical measurement of how hot or cold an object, liquid, or environment is. It is measured in degrees and is a fundamental concept used in daily life, science, and weather.