Question

Alguém me explica porfavor

Answer 1

Δ ABC ≈ Δ EDC
_AB_ = _BC_
  ED        CD
_AB_ = _15_ ⇒ AB = _4×15_ ⇒ AB = _1×15_ ⇒ AB = 15/2
   4           8                     8                         2
Δ ABC ⇒ retângulo
(AC)² = (AB)² + (BC)²
(AC)² = (_15_)² + 15²
                 2
(AC)² = _225_ + 225
                 4
(AC)² = _1125_
                 4
AC = _√[3²×5³]_ ⇒ AC = _15√5_
               √4                         2
Resposta: AB = _15_     AC = _15√5_
                             2                      2