Odpowiedzi

2010-04-15T17:40:16+02:00
1 bok - x
2 bok - x +2
3 bok - x +2 +2
4 bok - x +2+2+2

2+2+2+2+2+2= 12
16-12=4
x= 4:4 ( na 4 bo są 4 boki)
x=1

1 bok -1
2 bok - 1+2 =3
3 bok- 3+2=5
4 bok - 5+2=7
Ob= 1+3+5+7=16
2010-04-15T18:14:53+02:00
1bok - x | 1cm
2bok - x+2 | 3cm
3 bok - x + 2 + 2 | 5cm
4 bok - x+ 2 + 2 + 2 | 7cm

4x + 12 = 16
4x= 16 - 12
4x = 4 /:4
x = 1 {cm}


SPR. 7+ 5 + 3 + 1 = 16 [cm] .