tolong Bantu in yaa......

luas permukaan = 2. L trapesium + L alas + L atap + L sisi kanan + L sisi kiri
2. L trapesium = 2 x 10 + 16 x 8 : 2 = 26 x 8 = 208 cm²
L alas = 16 x 20 = 320 cm²
L atap = 10 x 20 = 200 Cm²
L sisi kanan = 8 x 20 = 160 cm²
L sisi kiri = 16 - 10 = 6 , 8 , 10 (triple pytaghoras) = 20 x 10 = 200 cm²
luas permukaan = 208 + 320 + 200 + 160 + 200 = C. 1.088 Cm²

smoga membantu ^_^