luas lingkaran 314 cm Berapa kelilingnya
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- Mencari r
= √(L ÷ π)
= √(314 ÷ 3,14)
= √100
= 10 cm
- Keliling
→ 2πr
→ 2 × 3,14 × 10 cm
→ 62,8 cm
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