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32=((12+(1/3*12))/2)*h
32=((12+4)/2)*h
32=(16/2)*h
32=8h /:8
h=4
ODP: Wysokość ma 4 cm.
32 = ( 12 + 4 ) *h :2
32 = 16 *h :2
32 = 8*h / : 8
h= 4