pliss bntu dong... nomor yg dilingkarin, soal kelas 3 sd

1.panjang 2 × DE - DG=2 × 8 - 8 = 8 cm
2.Pnjang AC = 18 cm.
= 18÷2=AB.
AB=9
Dit=AB + CD
=9 + 18 =27 cm
5.CD + BC
CD=AB
BC=AD
Jadi,CD + BC
=15 cm + 10 cm
=25 cm