also: とうへんさんかっけい
equilateral triangle
Geometric term for a triangle with three equal sides. Note: English gloss is 'isosceles triangle', but the Japanese term 等辺三角形 normally means 'equilateral triangle'. The English gloss may be an error; the standard Japanese term for 'isosceles triangle' is 二等辺三角形.
All three sides of an equilateral triangle are equal in length.
Standard kanji spelling.
Alternate reading with gemination; both readings are used.
Compound of 等辺 (tōhen, 'equal sides') + 三角形 (sankakukei, 'triangle').