How to say “triangle” in Japanese | 三角形 (さんかくけい、sankakukei/さんかっけい、sankakkei)

The Japanese vocabulary「三角形 (さんかくけい、sankakukei/さんかっけい、sankakkei)」means “triangle.” Please learn the pronunciation and the example sentences.

Japanese Vocabulary and the Meaning

There are two types of reading. We usually use「さんかっけい」when speaking.

The mark has another meaning, not only a triangle. If you do not know it, please read this page:

Please learn the pronunciation by watching the attached video. You can also learn example sentences.

Our main YouTube channel: Ichiyo’s Japanese YouTube Channel
Our sub-YouTube Channel (Japanese vocabulary videos): Ichiyo’s Subchannel

It is important to have skills in both non-honorific and honorific languages in order to use Japanese correctly.

Japanese Sentence	三角形さんかっけいの頂点ちょうてんはどこ？
Romaji Reading	Sankakkei no chōten wa doko?
English Meaning	Where are the vertices of this triangle? (Spoken and Non-Honorific Language)

Using “?” is unofficial in Japanese. We use it in casual chat.

Japanese Sentence	三角形の頂点はどこですか。
Romaji Reading	Sankakkei no chōten wa doko desu ka.
English Meaning	Where is the vertex of this triangle? (Polite Form)

Japanese Sentence	定じょう規ぎを使つかって三角形さんかっけいを書かいた。
Romaji Reading	Jōgi o tsukatte sankakkei o kaita.
English Meaning	I drew a triangle using a ruler. (Plain Form)

Japanese Sentence	定規を使って三角形を書きました。
Romaji Reading	Jōgi o tsukatte sankakkei o kakimashita.
English Meaning	I drew a triangle using a ruler. (Polite Form)

Japanese Sentence	三角形さんかっけいのボタンを押おした。
Romaji Reading	Sankakkei no botan o oshita.
English Meaning	I pressed the triangle button. (Plain Form)

Japanese Sentence	三角形のボタンを押しました。
Romaji Reading	Sankakkei no botan o oshimashita.
English Meaning	I pressed the triangle button. (Polite Form)