A1 noun Neutro #2,706 mais comum

直径

chokkei [tɕokːeː]

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.

Exemplos

3 de 5
1

このピザの直径は30センチです。

The diameter of this pizza is 30 centimeters.

2

太陽の直径は、地球の約109倍です。

The diameter of the sun is approximately 109 times that of the Earth.

3

ねえ、このボールの直径ってどれくらい?

Hey, what is the diameter of this ball?

Família de palavras

Substantivo
直径
Relacionado
半径
💡

Dica de memorização

The first kanji 直 (choku) means 'straight.' Think of a 'straight' line passing directly through the middle of a circle.

Quiz rápido

円の___は、半径の2倍の長さです。

Correto!

A resposta correta é: 直径

Exemplos

1

このピザの直径は30センチです。

everyday

The diameter of this pizza is 30 centimeters.

2

太陽の直径は、地球の約109倍です。

formal

The diameter of the sun is approximately 109 times that of the Earth.

3

ねえ、このボールの直径ってどれくらい?

informal

Hey, what is the diameter of this ball?

4

円の面積を計算するには、直径ではなく半径が必要です。

academic

To calculate the area of a circle, you need the radius, not the diameter.

5

このパイプの直径は、規格に合わせて50ミリにしてください。

business

Please ensure the diameter of this pipe is 50mm according to the standards.

Família de palavras

Substantivo
直径
Relacionado
半径

Colocações comuns

直径を測る to measure the diameter
直径5センチ 5cm in diameter
直径が大きい to have a large diameter
最大直径 maximum diameter
直径を計算する to calculate the diameter

Frases Comuns

直径に等しい

equal to the diameter

内径と外径

inner diameter and outer diameter

直径の長さ

the length of the diameter

Frequentemente confundido com

直径 vs 半径

Hankei (radius) is half the distance of the diameter (chokkei).

直径 vs 円周

Enshū (circumference) is the distance around the circle, not across it.

📝

Notas de uso

While commonly used in math, it is also frequently used when buying household items like frying pans, pots, or lightbulbs.

⚠️

Erros comuns

Learners often confuse 'chokkei' (diameter) with 'hankei' (radius). Also, avoid using 'nagasa' (length) alone when the specific dimension needed is the diameter of a circle.

💡

Dica de memorização

The first kanji 直 (choku) means 'straight.' Think of a 'straight' line passing directly through the middle of a circle.

📖

Origem da palavra

From the kanji 直 (direct/straight) and 径 (path/diameter). It literally means the 'straight path' through a circle.

Padrões gramaticais

Used as a standalone noun. Often follows the pattern [Noun] + の + 直径. Can be followed directly by measurements (e.g., 直径10cm).
🌍

Contexto cultural

In Japan, many household goods are categorized by diameter using the unit 'cm' or 'mm', which is essential for home shopping.

Quiz rápido

円の___は、半径の2倍の長さです。

Correto!

A resposta correta é: 直径

Palavras relacionadas

抗争

A1

A serious struggle or conflict between opposing groups, factions, or organizations. It often implies a prolonged period of resistance, power struggles, or violent feuding.

平和

A1

A state of harmony and the absence of conflict, war, or disturbance. It is used to describe both global stability between nations and a quiet, tranquil personal lifestyle or environment.

和平

A1

和平 (wahei) refers to a state of peace or the restoration of peace, specifically in a diplomatic or formal context between conflicting parties. Unlike the more general word for peace (平和), it often implies the process of ending a war or dispute through negotiation.

休戦

A1

A temporary cessation of fighting or conflict by mutual agreement; a truce or armistice. It indicates a period where parties agree to stop hostile actions, whether in a literal war or a metaphorical argument.

停戦

A1

A temporary cessation of fighting or a ceasefire agreement between opposing forces in a conflict. It is used when parties agree to stop hostilities to allow for negotiations, humanitarian aid, or the permanent end of a war.

組織

A1

Soshiki refers to a structured group of people working together for a specific purpose, such as a company, institution, or system. It can also refer to biological tissue in a medical or scientific context, describing how cells are arranged.

協会

A1

An organized group of people who have the same interest, job, or purpose. It is commonly used for professional bodies, sports leagues, or non-profit organizations that represent a collective interest.

学会

A1

An academic society or a professional organization where scholars and researchers share their findings. It also commonly refers to the specific academic conferences or meetings organized by these groups.

法人

A1

A legal entity or organization, such as a company or non-profit, that is recognized by law as having rights and duties similar to those of a person. It distinguishes a group or institution from an individual human being in legal and business matters.

組合

A1

A formal organization or association formed by individuals or groups with a common interest, most commonly referring to a labor union or a cooperative. It describes a collective body where members work together to achieve shared social, economic, or professional goals.

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