kk d jwb dengan cranya ya please kak

27.layang layang=d1×d2×1/2
=42×12×1/2
=252cm^2
jajargenjang=a×t
=24×12
=288cm^2
L=288+252=540cm^2

28.persegi=s×s
=28×28
=784m^2
lingkaran=Phi×r×r
=22/7×7×7
=154m^2
L=784-154=630m^2

29.1/3lingkaran=Phi×r×r÷3
=22/7×21×21÷3
=462cm^2

30.balok=p×l×t
=9×20×12
=2.160dm^3

27.B
28.B
29.A
30.D