Tolong bantuan nya kaka (。・ω・。)​

Jawaban:

13. dik, A s = 16 cm

B v = 5832 cm

C s = 21 cm

dit, S b…..?

jb, V = S ^3

5832 = S ^3

S ^3 = 5832

S = 3√ 5832

S = 18 cm

14. dit, V c……?

jb, V = S ^3

= 21 × 21 ×21

= 9.261 cm^3

15. dik, S = 23 cm

dit, V dan L…..?

jb , V = S ^3

= 23 × 23 × 23

= 12.167 cm^3

L = 6. S^2

= 6 × 23 ×23

= 3.174 cm^2

16. dik, panjang rusuk = 15cm

dit, V dan L…..?

jb , V = S ^3

= 15 × 15 × 15

= 3.375 cm^3

L = 6.S^2

= 6 × 15 ×15

= 1.350 cm^2

17. dik, s = 75cm

dit, keliling dan luas

jb, K = 4 × s

= 4 × 75

= 300 cm

L = s × s

= 75 × 75

= 5.625 cm^2

18. dik, P = 28 cm

L = 14 cm

T = 12 cm

dit, V……?

jb, V = P × L × T

= 28 × 14 × 12

= 4.704 cm^3

19. tabung terbentuk dari 3 bidang sisi

yaitu,

1. sisi alas ( berbentuk lingkaran )

2. selimut tabung ( berbentuk persegi

panjang )

3. sisi atap ( berbentuk lingkaran )

20. dik, d = 28 cm

T = 10cm

dit, V…..?

jb, r = d / 2

= 28/2

= 14 cm

V = phi × r × r × t

= 22/7 × 14 × 14 × 10

= 6.160 cm^3