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P=9,5 m²
a=3,8 m²
9,5=3,8b
b=2,5 m
9,5=x*3,8
3,8x=9,5/3,8
x=2,5
3,8m × X = 9.5m
3.8x = 9,5m
x= 9.5 ÷ 3.8
x= 2.5 m
Odp. C :)
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