Odpowiedź:
a)
5cm + 12cm * 3 cm /: 2
(17 cm * 3cm) : 2
51 cm : 2
P = 25,5 cm2
b)
6cm * 4cm = 24cm2
C) (5 cm * 9 cm) : 2 = 45cm : 2
P = 22,5cm2
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Odpowiedź:
a)
5cm + 12cm * 3 cm /: 2
(17 cm * 3cm) : 2
51 cm : 2
P = 25,5 cm2
b)
6cm * 4cm = 24cm2
C) (5 cm * 9 cm) : 2 = 45cm : 2
P = 22,5cm2
b) P=24 cm2
c) P=22,5 cm2