Question

Jawab ya pake cara sobat ku

Answer 1

No 11.
DE//AB, AB = 18, BE = 20, EC = 10  hitung L CDE
BC = 20 + 10 = 30

DE/AB = EC/BC
DE/18 = 10/30
DE = 18/3
DE = 6

LUAS CDE = 1/2 (10)(6)
                 = 30 cm²

12.  EF/AB = GE/AC
       EF/4 = 4,5/3
       EF = 4(4,5)/3
       EF = 18/3
       EF = 6 cm

yang lain sama cara pengerjaannya...