正せい三さん角かく形けいalso: せいさんかっけいせいさんかくけいFreq.FrequencyTop 100,000じ字FuriganaAudioMeanings1nounequilateral triangle; regular trianglegeometry›Geometry term for a triangle with three equal sides and angles.正せい三さん角かく形けいの内ない角かくはすべて60度どです。Break this sentence down in the analyzerAll interior angles of an equilateral triangle are 60 degrees.この図ず形けいは正せい三さん角かく形けいですか?Break this sentence down in the analyzerIs this shape an equilateral triangle?See all 16 example sentences ›