PERIMETRO DE UNA CIRCUNFERENCIA

1)Si una circunferencia mide 40cm de diámetro ¿Cuál es el perímetro?
C=2                                         C=2 TT R                                     3,14                    
TT=3,14                                  C=2 (3,14) (20cm)                          40
D=40cm                                                                                       --------
R=20cm                                                                                         125,60
                                                  C=125,60cm


2)SI una circunferencia mide 60cm de radio ¿Cuál es el perímetro?
C=2                                         C=2 TT R                                      3,14
TT=3,14                                  C=2 (3,14) (30cm)                           60
D=60cm                                                                                        ----------
R=30cm                                                                                         188,40
                                                C=188,40cm


3)Si una circunferencia mide 80cm  de diámetro ¿Cuál es el perímetro?  
C=?                                         C=2 TT R                                     3,14
TT=3,14                                  C= 2 (3,14) (40cm)                         80
D=80cm                                                                                       --------
R=40cm                                                                                        251,20 
                                                C=251,20cm


4)Si una circunferencia mide 10cm de diámetro ¿Cuál es el perímetro?
C=?                                        C=2 TT R                                       3,14
TT=3,14                                 C=2 (3,14) (5cm)                              10
D=10cm                                                                                        --------
R=5cm                                                                                           31,40
                                               C=31,40cm

5)Si una circunferencia mide 50cm de diámetro ¿Cuál es el perímetro?
C=?                                        C=2 TT R                                         3,14
TT=3,14                                 C=2 (3,14) (25cm)                              50
D=50cm                                                                                        ----------
R=25cm                                                                                           157,00
                                                C=157,00cm