A.《考工記》B.《海島算經(jīng)》C.《綴術(shù)》D.《緝古算經(jīng)》
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)》