Odpowiedź:
(bok a) a = 1 cm = 12 a = 12 cm 1cm² = 1 × 1
1)
6 × 2 = 12
a = 6cm
b = 2cm
P = a × b
P = 6 × 2
P = 12cm²
2)
4 × 3 = 12
a = 4cm
b = 3cm
P = 4 × 3
3)
1 × 12 = 12
a = 1cm
b = 12 cm
P = 1 × 12