zau1 gaai3周界
Jyutpingzau1 gaai3
Yalejāu gaai
Definition
Perimeter; the boundary or total length around a two-dimensional shape.
neutralschool
How it's used
Primarily used in mathematical or technical contexts to refer to the boundary length of a two dimensional shape. It is rarely used in casual conversation to describe the physical boundary of a property or area, where terms like 邊界 or 外圍 are much more common. Expect to encounter this term almost exclusively in geometry lessons or architectural discussions.
Examples
What is the perimeter of this rectangle?
We need to calculate the perimeter of the garden clearly.
Related words
Common phrases
calculate the perimeter
Common mistake
Learners often confuse this with 邊界, which refers to a border or boundary line between two regions, whereas 周界 specifically denotes the total length of the outer boundary of a shape.
Grammar color guide
Noun
Verb
Adjective
Adverb
Pronoun
Classifier
Particle
Connector
Grammar guides
- TonesCantonese has six tones, and the tones can change in certain grammatical contexts. Learn the six tones and the rules for tone change.
- Time and datesClock time, days of the week, months, and years. The patterns you need to make plans and talk about when things happen.
- Modal verbsHow to say can, will, may, should, must, and want. The core modal verbs of Cantonese and the differences that trip up beginners.
