perimetro de la circuferencia

1).una circunferencia mide 50 cm  de diámetro  ¿Cuál es el perímetro?

                                                                                                                 
                                                                                                                 
SOL C= ?                                                                                                 
TT=3,14                                                                                                   
R=25 CM                                                                                                
                      C=2(3,14)(25CM)           3,14x                                         
                                                                 80                                           
                                                            157,00                                         
                      C=157 CM                                                                         
                                                                                                                 
                                                                                                                 
                                                                                                                 
                                                                                                                 
 
 







2).una circunferencia  mide 80 cm de diámetro   ¿Cuál es el perímetro?

SOL C=?                                                                3,14x
                                                                                 80
TT=3,14                                                               251,20

R=40CM             C=2(3,14)(40CM)

                            C=251,2 CM           



3).una circunferencia mide  40 cm de diámetro  ¿Cuál es el perímetro?

SOL  C=?                                                                  3,14
                                                                                     40
TT=3,14                                                                   125,60

R=20CM                     C=2(3,14)(20CM)
                                    C=125,6


4.)una circunferencia mide  30 cm de diámetro ¿Cuál es el perímetro?

SOL  C=?

TT=3,14

R=15 cm