Sua nha
Doi:1m=100cm
Chu vi hinh chu nhat la:
100:5x3=60(cm)
Chieu dai la:
(60+6):2=33(cm)
Dien tich hinh chu nhat la:
33x(33-6)=891(cm2)
Dap so:891 cm2
Doi:1m=100cm
Chu vi hinh chu nhat la:
100:5x3=60(m)
Chieu dai hinh chu nhat la:
(60+6):2=33(m)
Dien tich hinh chu nhat la:
33x(33-6)=858(m2)
Dap so:858m2