bantuin dong. b, c, dan d
makasih banyak 
makasih banyak
Penjelasan dengan langkah-langkah:
b. Luas = (5+10)x8/2 = 60 cm²
Keliling = 5+7+10+7 = 29 cm
c. Luas = 12 x 6 = 72 cm²
Keliling = 12+5+12+5 = 34 cm
d. Luas = 15 x 6/2 = 45 cm²
Keliling = 4 x 7 = 28 cm
Jawaban:
a. Luas = 12 × 5
= 60 cm
keliling = 2 × ( 12 + 5 )
= 2 × 17
= 34 cm
b. Luas = (5+10)x8/2 = 60 cm²
Keliling = 5+7+10+7 = 29 cm
c. Luas = 12 x 6 = 72 cm²
Keliling = 12+5+12+5 = 34 cm
d. Luas = 15 x 6/2 = 45 cm²
Keliling = 4 x 7 = 28 cm
