Odpowiedź:
Ob = 30 cm
jeden bok - x
drugi bok - x+3
2(x + x + 3) = 30
2x + 2x + 6 = 30
4x + 6 = 30
4x = 30 - 6
4x = 24/4
x = 6
jeden bok - 6 cm
drugi bok - 9 cm
wysokość - 7 cm
P = 9 * 7
P = 63 cm²
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Odpowiedź:
Ob = 30 cm
jeden bok - x
drugi bok - x+3
2(x + x + 3) = 30
2x + 2x + 6 = 30
4x + 6 = 30
4x = 30 - 6
4x = 24/4
x = 6
jeden bok - 6 cm
drugi bok - 9 cm
wysokość - 7 cm
P = 9 * 7
P = 63 cm²