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SEA LA CIRCUNFERENCIA: D = 12 m, ENTONCES: R = 6 m
A = π × R² = π × (6 m)² = 36π m²
SEA LA CIRCUNFERENCIA: d = 8 m, ENTONCES: r = 4 m
A = π × r² = π × (4 m)² = 16π m²
LUEGO, LA DIFERENCIA SERÁ:
36π m² - 16π m² = 20π m²
ESO ES TODO, SALUDOS