Question

minta tolong kak nomor
13,14,15,16,17,19
yang lainnya ngga usah ​

Answer 1

Verified answer

Penjelasan dengan langkah-langkah:

13)

= (2 × la) + (ka × tp)

= (2 × s²) + ((4 × s) × tp)

= (2 × 12²) + ((4 × 12) × 15)

= (2 × 144) + (48 × 15)

= 288 + 720

= 1.008 Cm² (B)

14)

r = ½·8 = 4 Cm || t = 10 Cm

Luas permukaan :

= 2 × π × r × (r + t)

= 2 × 3,14 × 4 × (4 + 10)

= 25,12 × 14

= 351,68 Cm² (C)

15)

= 6 × s²

= 6 × 8²

= 6 × 64

= 384 Cm² (D)

16)

= π × r × (r + s)

= 22/7 × 7 × (7 + 10)

= 22 × 17

= 374 Cm² (D)

17)

r = ½·20 = 10 Cm

Luas permukaan :

= 4 × π × r × r

= 4 × 3,14 × 10 × 10

= 4 × 314

= 1.256 Cm² (B)

19)

Panjang sisi alas :

V = ⅓ × La × t

6.750 = ⅓ × s² × 10

s² = 6.750/10 ÷ ⅓

s² = 675 × 3/1

s² = 2.025

s = √2.025

s = 45 Cm (D)

Answer 2

13. (2 . (12(12) + (4 . 12 . 15)

= (2 . 144) + (4 . 180)

= 288 + 720

= 1.008cm²

14. L = 2πr(r + t)

= (2(π(8/2(8/2 + 10)

= (2(π(4(4 + 10)

= (2(4(14(π)

= (2(56(π)

= (112(3,14)

= 351,68cm²

15. LP > 6s²

= (6 . 8 . 8)

= (48 . 8)

= 384cm²

16. L = πr(r + s)

= (22/7(7(7 + 10)

= (22/7(7(17)

= (22/7(119)

= (22(119)/7)

= 2.618/7

= 374cm²

17. L = 4πr²

= (4(π(20/10)²

= (4(π(10(10)

= (4(10(10(π)

= (4(100(π)

= (400(3,14)

= 1.256cm²

19. V = 1/3lat

S = √V(1/3)/10

S = √6.750(1/3)/10

S = √(6.750(3)/10

S = √20.250/10

S = √2.025

S = √45²

S = 45cm