tolong jawab 21 -27 yaaaa

21. D

22.
ds = 8√2 cm
s = 8√2 cm : √2
s = 8 cm
v = s³
v = (8 cm)³
v = 512 cm³ (C)

23. C

24.
K = 192 cm
r = 192 cm : 12
r = 16 cm
Lp = r² x 6
Lp = (16 cm)² x 6
Lp = 256 cm² x 6
Lp = 1536 cm² (A)

26.
s = 20 cm,48 cm, 52cm
tp= 71 cm
Lp= 2La + tp x Ka
La = 20 cmx48 cm :2
La = 480 cm²
Ka = 20 cm + 48 cm + 52 cm
Ka = 120 cm
Lp = 2 La+ tpxKa
Lp = 2x480 cm² + 71 cm x 120 cm
Lp = 960 cm² + 8520 cm²
Lp = 9480 cm² (B)

27.
Ka = 96 cm
s = 24 cm
tl = 35 cm
ts = 37 cm
La = (24 cm)²
La = 576 cm²
Ls = 24 cm x 37 cm :2 x 4
Ls = 1776 cm²
Lp = La + Ls
Lp = 576 cm² + 1776 cm²
Lp = 2352 cm² (C)