Kak tolong dijawab ya big poin​

Jawaban:

1. Alas = 8 cm

t alas = 5 cm

t prisma = 12 cm

v = La x t

v = ( 8 x 5 / 2 ) x 12

v = 20 x 12

v = 240 cm³

2. • v kubus 1

= s³

= 3³

= 27 cm³

• v kubus 2

= s³

= 9³

= 729 cm³

• Perbandingan

= 27 : 729

= 1 : 27 — keduanya dibagi 27

3. Rusuk = 70 cm

• Volume

= s³

= 70³

= 343.000 cm³ —- 343 dm³ = 343 L

4. p = 10 m

l = 6 m

t = 3 m

Lp = pl + 2( pt + lt )

Lp = ( 10 x 6 ) + 2( 10 x 3 ) + ( 6 x 3 ) )

Lp = 60 + 2( 30 + 18 )

Lp = 60 + 2 ( 48 )

Lp = 60 + 96

Lp = 156 m²

Jawaban:

17. C

18. D

19. A

20. D

Penjelasan dengan langkah-langkah:

17.) (5cm×8cm/2)×12 cm

(5cm×4cm)×12cm

20 cm²×12 cm

240cm³

18.) Kubus I = 3 cm×3cm×3cm

27 cm³

Kubus II=9cm×9cm×9cm

729cm³

27 : 729

1 : 27

19.) 70cm×70cm×70cm

343.000cm³

343 Liter

20.)2×(p×l+p×t+l×t)-p×l

2×(10cm×6cm+10cm×3cm+6cm×3cm)-10cm×6c

2×(60cm²+30cm²+18cm²)-60 cm²

2×108cm²-60cm²

216cm²-60cm²

156 cm²

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