Odpowiedzi

2010-03-23T15:50:09+01:00
AB : CD = 5 : 7
AB = 25 cm
CD = x

5/7 = 25/x
5x = 25 * 7
5x = 175
x = 35
36 3 36
2010-03-23T15:51:28+01:00
AB= 5x CD=7x

5x=25
x=25 : 5
x=5


7x= 7*5= 35 cm = CD
14 3 14
2010-03-23T15:51:32+01:00
AB:CD = 5:7
25cm:CD = 5:7
Stąd 5CD = 7*25cm
5CD = 175 cm
CD = 35 cm
4 3 4