Bantuin dong pake Cara plisss

1) Luas = 1/2 x (18 + 18 + 5 + 5) x 12
Luas = 1/2 x 46 x 12 = 276 cm^2

2) Luas = 3,14 x 10 x 10 = 314 cm^2

3) Luas = 24 x 16 + 1/2 x 12 x 8
Luas = 384 + 48
Luas = 432 cm^2

L=TL×r×r
=3,14×10×10
=314cm²