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焦点 (幾何学)

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Wikipedia definition

1. Focus (geometry)In geometry, the foci are a pair of special points with reference to which any of a variety of curves is constructed. For example, foci can be used in defining conic sections, the four types of which are the circle, ellipse, parabola, and hyperbola. In addition, foci are used to define the Cassini oval and the Cartesian oval.
Read “Focus (geometry)” on English Wikipedia
Read “焦点 (幾何学)” on Japanese Wikipedia
Read “Focus (geometry)” on DBpedia

5.658827378139653

12 strokes. JLPT N1. Jōyō kanji, taught in junior high.

焦

char, hurry, impatient, irritate, burn, scorch, singe

Kun: こ.げる、こ.がす、こ.がれる、あせ.る、じ.れる、じ.らす

On: ショウ

0.4798080767692923

9 strokes. JLPT N3. Jōyō kanji, taught in grade 2.

点

spot, point, mark, speck, decimal point

Kun: つ.ける、つ.く、た.てる、さ.す、とぼ.す、とも.す、ぼち

On: テン

10.032350696085203

12 strokes. JLPT N3. Jōyō kanji, taught in junior high.

幾

how many, how much, how far, how long, some, several

Kun: いく-、いく.つ、いく.ら

On: キ

1.9773908618370832

7 strokes. JLPT N5. Jōyō kanji, taught in grade 2.

何

what

Kun: なに、なん、なに-、なん-

On: カ

0.1831994474937298

8 strokes. JLPT N5. Jōyō kanji, taught in grade 1.

学

study, learning, science

Kun: まな.ぶ

On: ガク

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