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Ana Beatriz encontrou uma figura triangular e, junto com a professora, mediu a espessura da figura. Detectaram que a área da figura era de 4,5 m2, porém Ana Beatriz não entendeu por que a base media x + 5 e a altura x – 3. Após alguns cálculos, Ana Beatriz apresentou o x da questão como sendo:
(A) 8 m.
(B) 7 m.
(C) 6 m.
(D) 5 m.
(E) 4 m.
Sagot :
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