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a² + b² = c²
3² + 6² = c²
9 + 36 = c²
c = 45
Przekątna tego prostokąta wynosi 45 cm.
b)
a² + b² = c²
√18 + √18 = c²
c = 36
c = √36
c = 6
Przekątna tego kwadratu wynosi 6 cm.