Tolong Di jawab ya kakak2 yang baik :)

Nyari luas gabungan ya ???
B.) B1 = L = a × t
= 18 × 8 = 144
B2= L = a × t
= 14 × 8 = 112
Luas = B1 + B2 = 144 + 112 = 256

C.) B1 = L = 1/2 × D1 × D2
= 12 × 6 = 72
B2= L = p × l
= 5 × 6 = 30
Luas = B1 + B2 = 72 + 30 =102
Mohon maaf kalo ada yang salah

c. Luas bgn gabungan=
=L. layang2 + L. trapesium
=(1/2×d1×d2)+((a+b)×t×1/2)
=(1/2×20×12)+((5×20)×6×1/2)
=(1/2×240) +((100)×6×1/2)
=(1/2×240) +(600×1/2)
=120 +300
=420 cm2

b. Luas bgn gabungan=
=L. jajar genjang + L. jajar genjang
=((a+b)×t×1/2) +((a+b)×t×1/2)
=((14+14)×8×1/2) +((18+12)×8×1/2)
=((28)×8×1/2) +((30)×8×1/2)
=224×1/2 +240×1/2
=112 +120
=232 cm2

#SemogaMembantu.
#Jadikan terbaik ya.