平面几何 Traditional 平面幾何 píng miàn jǐ hé 🔊 plane geometry + Review this word Meanings píng miàn jǐ hé 平面幾何 plane geometry Its characters 平píngflat; level; smoothHSK 5面miànfaceHSK 2几jǐhow many (a few)HSK 1何héwhat