Tolong!!!! dijwab kak... pake cara yah kak.. 19-20

19.5×56=280m2=2,8dm2=2,8are
20.D.segitiga sama sisi

19. Diketahui: 1 kaleng cat =56m^2
Ditanya : 5 kaleng cat = ...... are
Jawab: 56x5 kaleng cat = 280m^2
1 are = 100 M^2
280:100= 2,8 are (B)
20. D. Sama Sisi