Semua nya dong plsskalo gk mau paling gk 11 sampe 16 kek plsbentar lagi di kumpul​

By Posted on

Semua nya dong plsskalo gk mau paling gk 11 sampe 16 kek plsbentar lagi di kumpul​

Semua nya dong plsskalo gk mau paling gk 11 sampe 16 kek plsbentar lagi di kumpul​

Penjelasan dengan langkah-langkah:

11. r1 = 3,5 cm

r2 = 3,5 cm x 2 = 7 cm

L2 = ¼ x π x r²

L2 = frac{1}{4} times frac{22}{7} times 7 times 7 \ L2 = frac{1}{4} times 22 times 7 \ L2 = frac{1}{4} times frac{22}{1} times frac{7}{1} \ L2 = frac{1 times 22 times 7}{4 times 1 times 1} \ L2 = frac{154}{4} \ L2 = 37 frac{6}{4}

L1 = ¼ x π x r²

L1 = frac{1}{4} times frac{22}{7} times 3.5 times 3.5 \ L1 = frac{1}{4} times frac{22}{2} times frac{35}{10} \ L1 = frac{1 times 22 times 35}{4 times 2 times 10} \ L1 = frac{770}{80} \ L1 = 9 frac{50}{80}

Luas bagian yang diarsir adalah …

L2 - L1 \ = 37 frac{6}{4} - 9 frac{50}{80} \ = (37 - 9) frac{120 - 50}{80} \ = 28 frac{70}{80} \ = 28 frac{7}{8}

maka, Luas bagian yang diarsir adalah (d) 28⅞ cm²

12. d = 21 cm

r = 21 : 2 = 10,5 cm

L = frac{1}{2} times frac{22}{7} times 10.5 times 10.5 \ L = frac{1}{2} times 33 times 10.5 \ L = 16.5 times 10.5 \ L = {173.25 : cm}^{2}

maka, Luas bangun tsb adalah (a) 173.25 cm²

13. d = 22 dm

r = 22 : 2 = 11 dm

L = frac{1}{2} times 3.14 times 11 times 11 \ = {189.97 : dm}^{2}

maka, Luas bangun tsb adalah (d) 189.97 dm²

14. r = 6 cm

L = frac{1}{2} times 3.14 times 6 times 6 \ L = {56.52 : cm}^{2}

maka, Luas bangun tsb adalah (d) 56,52 cm²

15. r = 20 cm

L = frac{1}{2} times 3.14 times 20 times 20 \ L = {628 : cm}^{2}

maka, Luas bangun tsb adalah (d) 628 cm²

16. d = 28 cm

r = 28 : 2 = 14 cm

L = frac{1}{2} times frac{22}{7} times 14 times 14 \ L = frac{1}{2} times 22 times 2times 14 \ L = {308 : cm}^{2}

maka, Luas bangun tsb adalah (a) 308 cm²

Bagian II

1. r = 10 cm

L = frac{1}{4} times 3.14 times 10 times 10 \ L = {78.5 : cm}^{2}

2. r = 28 cm

L = frac{3}{4} times frac{22}{7} times 28 times 28 \ L = frac{3}{4} times 22 times 4 times 28 \ L = {1848 : cm}^{2}

3. r = 21 cm

d = 21 x 2 = 42 cm

kll = pi times d \ kll = frac{22}{7} times 42 \ kll = 22 times 6 \ kll = 132 : cm

4. r = 10

d = 10 x 2 = 20 cm

kll = frac{1}{4} times pi times d \ kll = frac{1}{4} times 3.14 times 20 \ kll = 15.7 : cm

5. d = 40 cm

kll = π x d

kll = 3,14 x 40

kll = 125,6 cm

6. r = 20 cm

d = 20 x 2 = 40 cm

kll = π x d

kll = 3,14 x 40

kll = 125,6 cm

7. d = 20

kll = π x d

kll = 3,14 x 20

kll = 62,8 cm