1272 adの例文

• "Ceyuan haijing " ( pinyin : C鑩u醤 H?ij靚g ) ( Chinese characters :, nWwm釗 ), or " Sea-Mirror of the Circle Measurements ", is a collection of 692 formula and 170 problems related to inscribed circle in a triangle, written by Li Zhi ( or Li Ye ) ( 1192 1272 AD ).