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b)8* a*h\2= 8* 2*3\2= 8*3= 24 cm2
24 cm2 - 2cm*4cm= 16 cm2
c) 6cm*6cm= 36 cm2
36 cm2 - a*h\2= 36 cm2 - 3*4\2= 36 cm2 - 6 cm2 = 30 cm2
mam nadzieję że pomogłam :)