Burgess Crawford
06/29/2023 · Middle School
24 Soit \( A B C \) un triangle isocèle en \( A \). Les points \( E ; I ; F \) et \( J \) sont tels que : - \( E \) est le projeté orthogonal du point \( B \) sur la droite \( (A C) \). - \( F \) est le projeté orthogonal du point \( E \) sur la droite \( (A B) \). - \( I \) est le projeté orthogonal du point \( C \) sur la droite \( (A B) \). - \( J \) est le projeté orthogonal du point \( I \) sur la droite \( (A C) \). 1) Comparer \( \frac{A F}{A I} \) et \( \frac{A E}{A C} \). 2) Comparer \( \frac{A I}{A B} \) et \( \frac{A J}{A E} \). 3) Montrer que le triangle \( A J F \) est isocèle.
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1) \( \frac{AF}{AI} = \frac{AE}{AC} \).
2) \( \frac{AI}{AB} = \frac{AJ}{AE} \).
3) Le triangle \( AJF \) est isocèle en \( A \).
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