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b-4dm =40cm
c-?
a2+b2=c2
9kwadrat+40kwadrat=c2
81+1600=c2
c2=1681
c=pierwiastek 1681cm
a-16cm
h-15cm
b-?
a2+h2=b2
12kwadrat+15kwadrat=b2
144+225=b2
369=b2
b=pierwiastek369cm