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P1 = a * a
P1 = 11cm * 11 cm
P1 = 121cm2
a2 = 11cm + 4 cm = 15 cm
P2 = a2 * a2
P2 = 15 cm * 15cm
P2 = 225 cm2
P2 - P1 = 225cm2 - 121cm2 = 104 cm2
P=11cm*11cm
P=121cm²
P=15cm*15cm
P=225cm²
225cm²-121cm²=104cm²
Odp.Pole zwiększy się o 104 cm².
P = a²
a = 11cm
P = (11cm)²
P= 11cm * 11cm
P = 121cm²
II. Pole kwadratu o boku 15 cm (11cm + 4cm).
P = a²
a = 15cm
P = (15cm)²
P = 15cm * 15cm
P = 225cm²
225cm² - 121cm² = 104cm²
Odp.: Pole kwadratu zwiększy się o 104cm².