Răspuns :
6,4 dam = 64 m
latimea = a
lungimea = a +12
( a +a + 12) x 2 = 64
2a + 12 = 64 : 2
2a + 12 = 32
2a = 32 - 12
2a = 20
a = 20:2
a =10
Latimea = 10 m
Lungimea = 10 + 12 = 22 m
latimea = a
lungimea = a +12
( a +a + 12) x 2 = 64
2a + 12 = 64 : 2
2a + 12 = 32
2a = 32 - 12
2a = 20
a = 20:2
a =10
Latimea = 10 m
Lungimea = 10 + 12 = 22 m