Tolong bantu dong plisss nanti aku kasih yg terbaik ya

rumus trapesium
L = 1/2 x (jumlah sisi sejajar) x t

nomor 1.
330 = 1/2 x (s1 + s2) x t
330 = 1/2 × 12 x (s1 + 19)
330/6 = s1 + 19
55 -19 = s1
s1 = 36cm

nomor 2

119 = 1/2 x (s1 + s2) x t
119 = 1/2 × 7 x (19 + s2)
119 / 3,5 = 19 + s2
34 -19 = s1
s1 = 15cm

nomor 3.
312 = 1/2 x (28+ 20) x t
312 = 24 x t
t = 312 / 24 = 13cm

nomor 4
L= 1/2 x (25 + 26) x 12
L = 1/2 x 51 x 12
L = 306 cm2