Объяснение:
1)r=2 cm;d=4 cm;C=12,56 cm;S=12,56 cm²
2)r=4 cm;d=8 cm;C=25,12 cm;S=50,24 cm²
3)r~4,77 cm;d~9,54 cm;C=30 cm;S=71,48 cm²
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Объяснение:
1)r=2 cm;d=4 cm;C=12,56 cm;S=12,56 cm²
2)r=4 cm;d=8 cm;C=25,12 cm;S=50,24 cm²
3)r~4,77 cm;d~9,54 cm;C=30 cm;S=71,48 cm²