○+□=20--------------------(1)
△+□=11-------------------(2)
○+△+□=27----------------(3)
(3)-(1):△=27-20=7
(3)-(2):○=27-11=16
由(1)得:□=20-○=20-16=4
答案:三角形△=7,正方形□=4,圆○=16.
○+□=20--------------------(1)
△+□=11-------------------(2)
○+△+□=27----------------(3)
(3)-(1):△=27-20=7
(3)-(2):○=27-11=16
由(1)得:□=20-○=20-16=4
答案:三角形△=7,正方形□=4,圆○=16.