bonjour
AD = √ 1 600 = 40 cm
IA = 40 cm
AF = 35 cm
FB² = 40² - 35 ² = 375
FB = √ 375 = 5 √15 cm ≅ 19.4 cm
BG = 18 cm
GC² = 40² - 18 ² = 1276
GC = √ 1276 = ≅ 35.7 cm
CD = 40 cm
Longueur = 40 + 40 + 40 + 35 + ≅ 19.4 + 18 + ≅ 35.7
= ≅ 228.1 = 228 cm arrondi unité
