kk tolong bantu ya, jangan ngasal, buat cara nya ya kk
Jawaban:
Jari-jari (r) = 105 cm
Diameter (d) = 210 cm
Keliling (k) = 660 cm
Penjelasan dengan langkah-langkah:
[tex]luas \: lingkaran = \pi \times r \times r \\ 34.650 = \frac{22}{7} \times r {}^{2} \\ 34.650 \times \frac{7}{22} = r {}^{2} \\ 1.575 \times 7 = r {}^{2} \\ r {}^{2} = 1.575 \times 7 \\ r { }^{2} = 11.025 \\ r = \sqrt{11.025} \\ r \: = 105 \: cm[/tex]
Diameter
[tex]d \: = 2 \times r \\ d = 2 \times 105 \\ d = 210 \: cm[/tex]
Keliling
[tex]keliling \: lingkaran = \pi \times d \\ k = \frac{22}{7} \times 210 \\ k = 22 \times 30 \\ k = 660 \: cm[/tex]
Semoga membantu ^^
