Question

Tolong dijawab ya tentang lingkaran ini ya ..
1. r = 5 dm, d = 10 dm, L = ?
2. r = 8 dm , d = 16 dm, L = ?
3. r = 14 cm, d = 28 cm, L = ?
4. d = 35 cm, L = ?
5. d = 9 dm , L = ?
6. d = cm , L = ?
Pakai Cara ya... Makasih

Answer 1

1. L = 3,14 × r²
L = 3,14 × 5 × 5 = 78,5 dm²
2. L = 3,14 × r²
L = 3,14 × 8 × 8 = 200,96 dm²
3. L = 22/7 × r²
L = 22/7 × 14 × 14 = 616 cm²
4. r : 17,5
L = 3,14 × r²
L = 3,14 × 17,5 × 17,5 = 962,5 cm²
5. r : 4,5
L = 3,14 × r²
L = 3,14× 4,5 × 4,5 = 63,585 dm²
6. Maaf diameter.nya berapa ya??

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