zad2
7x7=49cm2
4x7=28cm
Odp.Obwód=28cm
zad3
4x2=8cm
30-8=22cm
22:2=11cm
11x8=88cm2
Odp.Pole=88cm2
zad4.
12+3=15
P=12x15:2=6x15=90cm2
OdpP=90cm2
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zad2
7x7=49cm2
4x7=28cm
Odp.Obwód=28cm
zad3
4x2=8cm
30-8=22cm
22:2=11cm
11x8=88cm2
Odp.Pole=88cm2
zad4.
12+3=15
P=12x15:2=6x15=90cm2
OdpP=90cm2
4*7cm=28cm-obwod kwadratu
zad3
30-(2*4)=22
22:2=11-drugi bok
11cm*4cm=44cm2-pole prostokąta