Question

necesito ayuda esto es para un examen​

Answer 1

A = π × r²

1. A=π × 9.5²= 90.25π = 283.53 cm²

2. r = d÷2 = 25 ÷ 2 = 12.5

A= π × 12.5² = 156.25π = 490.87 cm²

3. A = π × 11.11² = 123.43π = 387.77 cm²