Question

Uma criança coloca um copo molhado sobre a mesa, e nela ficou a marca da base circular do copo. Se a área da base circular é de 36π cm², o diâmetro do copo é?...  

Answer 1

Uma criança coloca um copo molhado sobre a mesa, e nela ficou a marca da base circular do copo. Se a área da base circular é de 36π cm²,O DIAMETRO copo   é?...                                                                                                                                                 Área circular = 36πcm²                                                                                                   USAREMOS A FÓRMULA                                                                                                          temos que achar o (r) = RAIO                                                                                                                                                          A = 36πcm²                                                                                                                                A = π.r²    -----(subsituir A ÁREA)                                                                                      36πcm² = πr²                                                                                                                            πr² = 36πcm²                                                                                                                               r² = 36πcm²/π      
     
        36πcm² : π           36cm²
r² = -------------          = ----------- 
             π     : π               1


 r² = 36cm²
r   = √36cm²  
  r = 6cm
se
o
DIAMETRO = 2(RAIO)
diametro = 12cm