Răspuns:
AD = 2√14 / 3 cm ≈ 2,49 cm
Explicație pas cu pas:
AB=3 cm, BC=6 cm, AC=5 cm
Aria Δ ABC = BC·AD/2 = √[p·(p-AB)·(p-AC)·(p-BC)]
(formula lui Heron)
p = P/2 = (AB+AC+BC)/2 = (3+5+6)/2 = 14/2 = 7 cm
Aria Δ ABC = √[7·(7-3)·(7-5)·(7-6)] = √(7·4·2·1) = √56 = 2√14 cm²
= > 6·AD/2 = 2√14 => AD = 2√14 / 3 cm ≈ 2,49 cm
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