kak tolong ya di bantu no 28 dan 29 , sama caranya ya kak. makasih

28. AB/GB = AD/GF
8/4 = AD/8
AD = 8×2 = 16 cm

AB/GB = BC/BE
2 = BC/12
BC = 12×2 = 24 cm

L trapesium ABCD = 1/2×(AD+BC)×AB
= 1/2×(16+24)×8
= 4×40 = 160 cm²

29. 36/30 = 48/panjang foto
panjang foto = 48 × 5/6 = 40 cm

L yg tdk tertutup = L karton-L foto
= 36×48 - 30×40
= 1728 - 1200
= 528 cm²