Odpowiedź:
obwód = a + 7 + 8 + 5 + a + 3 +7 = 2a + 30
pole = (a + 7) * 5 + 3 * 7 = 5a + 35 + 21 = 5a + 56
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Odpowiedź:
obwód = a + 7 + 8 + 5 + a + 3 +7 = 2a + 30
pole = (a + 7) * 5 + 3 * 7 = 5a + 35 + 21 = 5a + 56