[tex] Keliling \: \frac{1}{4} \: lingkaran \\ \\ 3,57 \times r\\ \\ 3,57 \times 40 \: cm \\ \\ 142,8 \: cm \: (b)[/tex]
Jawaban:
b. 142,8 cm
Penjelasan dengan langkah-langkah:
[tex]k = 2r + 1per4 \times 2\pi \\ k = 2 \times 40 + 1per4 \times 2 \times 3,14 \times 40 \\ k = 80 + 62.8 = 142,8 \: cm[/tex]
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[tex] Keliling \: \frac{1}{4} \: lingkaran \\ \\ 3,57 \times r\\ \\ 3,57 \times 40 \: cm \\ \\ 142,8 \: cm \: (b)[/tex]
Jawaban:
b. 142,8 cm
Penjelasan dengan langkah-langkah:
[tex]k = 2r + 1per4 \times 2\pi \\ k = 2 \times 40 + 1per4 \times 2 \times 3,14 \times 40 \\ k = 80 + 62.8 = 142,8 \: cm[/tex]