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Dane:
P = 91
a = 7
91 = 7h / :7
h = 13
odp. Wysokość ma długość 13 cm.
P= a*h
91 = x * 7
x = 13
odp.: H = 13cm
P=91cm²
P=ah
91=7h
h=91:7
h=13cm
wysokość wynosi 13cm