Resposta :
____________________
A)
A = πr²
A = (3,14)(8)²
A = (3,14)(64)
A = 200,96cm²
____________________
B)
A = πr²
A = π(d/2)²
A = π(23/2)²
A = π11,5²
A = π132,25
A = 415,265cm²
____________________
Att: MarcosPCV
A)
A = πr²
A = (3,14)(8)²
A = (3,14)(64)
____________________
B)
A = πr²
A = π(d/2)²
A = π(23/2)²
A = π11,5²
A = π132,25
Att: MarcosPCV