No 6 dong bantuin plissss

Volume = 1/3 × La × T
Volume = 1/3 × s × s × t
Volume = 1/3 × 18 × 18 × 15
Volume = 1/3 × 4860
Volume = 1620 cm3

Cari tinggi limas
t² = OA² - (1/2.AC)²
t² = 15² - 9²
t² = 225 - 81
t² = 144
t = √144
t = 12 cm

Cari Luas persegi
Diagonal  = √2.Luas
18 = √2.Luas
2. Luas = 18²
2. Luas = 324
Luas = 324 / 2
Luas = 162 cm²

Volume Limas = 1/3 x Luas alas x tinggi
V = 1/3 x 162 x 12
V = 162 x 4
V = 648 cm³

Jawaban A