Tolong pakek rumus yah
kelas 6d
Cepet yah bentar lgi mau dikumpul
kelas 6d
Cepet yah bentar lgi mau dikumpul
Jawaban:
Rumus Laus permukaan Kerucut
[tex]L = \pi \times r \times (r + s)[/tex]
keterangan:
L = luas permukaan
r = jari jari
s = selimut kerucut
phi = 22/7 atau 3,14
1. r = 7 cm
s = 12 cm
ditanya: L
jawab:
[tex]L = \pi \times r \times (r + s) \\ = \frac{22}{7} \times 7 \times ( 7 + 12) \\ = 22 \times 19 \\ = {418 \: cm}^{2} [/tex]
2. r = 8 cm
s = 22 cm
ditanya: L
jawab:
[tex]L = \pi \times r \times (r + s) \\ = 3,14 \times 8 \times ( 8 + 22) \\ = 25,12 \times 30 \\ = {753,6\: cm}^{2} [/tex]
3. diameter (d) = 28 cm
r = 1/2 × d
= 1/2 × 28
= 14 cm
s = 26 cm
ditanya: L
jawab:
[tex]L = \pi \times r \times (r + s) \\ = \frac{22}{7} \times 14 \times ( 14+ 26) \\ = 44 \times40 \\ = {1.760 \: cm}^{2} [/tex]
[answer.2.content]
