Question

Ini yg nomer 40
Tolong jawab

Answer 1

10-7 = 3
maka :
t trapesium = akar dr 5²-3²
= akar dr 25-9
= √16
t = 4 cm

jadi, V prisma = L alas.t
= (1/2.jumlah sisi sjajar.t).t
= (1/2.(10+7).4).12
= (2.17).12
= 34.12
= 408 cm kubik

Answer 2

Tinggi balok kayu = √5² - (10-7)² = √25-9 = √16 = 4 cm
Luas trapesium = 1/2 x (7+10) x 4 = 34 cm²

Volume = Luas trapesium x panjang balok = 34 x 12 = 408 cm³