Tolong jawab,,, Jgn lupa pake caranya ya...

L= 56cm
AB : CD = 3:4
tinggi = 8cm

L = ½ x (a+b) x t
56 = ½ x (3X + 4X) x 8
56 x 2 = 7X x 8
112 = 56X
112 : 56 = X
2 =X

AB = 3X
3 x 2
6 cm

CD = 4X
4 x 2
8 cm

selisih = 8-6 = 2 cm