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h1=5
b= 4
h2=?
P=a*h1
P= 6*5= 30
h2= 30:4
h2=7,5
odp. h2= 7,5cm
b=6cm
h₁=5cm
p=a*h
p=4cm*5cm=20cm²
20cm²=6cm*h₂
h₂=20cm²/6cm=3⅓cm
odp. Druga wysokośc ma 3⅓cm
ha=5cm
b=4cm
hb=?
P=a*ha=6*5=30cm2
hb=30:4=7,5cm