A.3.1 B.3.14 C.3.142 D.3.1415926
A.《九章算術(shù)》B.《孫子算經(jīng)》C.《周髀算經(jīng)》D.《綴術(shù)》
A.《數(shù)書九章》 B.《五經(jīng)算術(shù)》 C.《綴術(shù)》 D.《緝古算經(jīng)》