P=b×h1
b=12
h1=15
P=12×15=180
a=x
h2=10
pole jest takie same
10x=180/:10
x=18
odp. a=18
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P=b×h1
b=12
h1=15
P=12×15=180
a=x
h2=10
pole jest takie same
10x=180/:10
x=18
odp. a=18