oblicz pole wielokąta.
2 KRATKI TO 1 CM /tak nauczycielka postanowiła/
P=[ab + 1/2(a+b)h]-a1b1
P=[1cm*3cm + 2*0,5(1cm+3cm)*1cm] - 1cm * 2cm
P=[3 + 4] - 2
P=5 cm^2
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P=[ab + 1/2(a+b)h]-a1b1
P=[1cm*3cm + 2*0,5(1cm+3cm)*1cm] - 1cm * 2cm
P=[3 + 4] - 2
P=5 cm^2