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P=a²
a=√P
a=√(81cm)
a=9cm
pozdrawiam
P=½pq
P=½×27cm×6cm=81cm²
P=a²
a=√P
a=√(81cm²)
a=9cm
= 1/2*27*6 = 81cm
P.kwadratu= a*a
= 9*9=81cm2
ODP: 9 cm