Tolong bantu nomor 2 yahh ..dikumpulin besok

EG/AB = DE/AD
EG/12 = 3/6
EG/12 = 1/2
2EG = 12
EG = 12/2
EG = 6 cm

EF = (DE x AB) + (AE x CD) ÷ AE + DE
= (3 x 12) + (3 x 6) ÷ 3+3
= 36+18 ÷ 6
= 54÷6
= 9 cm

*semoga membantu. sukses selalu ^_^