tolong jawab no 29 dan 30 senin harus di kumpulin nihhh

29 a .
L1 = 6x15 = 90
L2 = 6x6 = 36
L3 = 6x6:2 = 18
L = 90+36+18 = 144 cm^2
29 b.
L1 = 5+7x8:2 = 48
L2 = 7x15 = 105
L2 = 22/7 x 3,5 x3,5 : 2 = 19,25
48+105-19,25 = 133,75
133,75 + 48 = 181,75cm^2

30.
L=48x45 = 2160 m^2
2160 - 270 = 1890 m
1890 : 21 = 90 m^2