Understanding 半径 (bànjìng)
The word 半径 literally means "half path" and refers to the radius of a circle or sphere — the distance from the center to the edge. It is a technical term commonly used in geometry, physics, and engineering.
Usage in Context
半径 is primarily used to describe measurements related to circles or spheres. For example, when discussing the size of a circle, 半径 is essential for calculating area or circumference. It also appears in everyday contexts like describing the coverage area of wireless signals, where the "radius" indicates how far the signal reaches.
Common Collocations
- 半径长度 (radius length): specifying the measurement of the radius.
- 覆盖半径 (coverage radius): used in technology to describe signal range.
- 半径为... (radius is...): a common way to state the radius value.
Tips
When using 半径, remember it always relates to a distance from a center point outward. Do not confuse it with 直径 (diameter), which is twice the 半径. In conversation, 半径 is often paired with units of measurement like 厘米 or 米.
Avoid mixing 半径 with 距离 (distance) in contexts where the specific geometric meaning is required, as 距离 is more general.