Question

Nomor 20 apa ya kak ?
bantu dong kak

Answer 1

16 = 3 x CD + 2 x 28 / 5
16 x 5 = 3CD + 56
80 = 3CD + 56
3CD = 80 - 56
CD = 24/3
CD = 8 cm

Answer 2

EF = AB.DE + DC.AE
            DE + AE
16 = 28.2 + DC.3
             2 + 3
16 = 56 + 3DC
             5
80 = 56+3DC
DC = 80 - 56
             3
DC = 8cm