Réponse :
bonjour
MA/MN = MI/MH = AI / NH
3.5 /5 = MI/4
MI = ( 3.5 x 4 ) / 5 = 2.8 m
MA/MN = MB/MP = AB / NP
3.5/5 = AB/ 7
AB = ( 3.5 * 7 ) / 5 = 4.9 cm
MA/MB = MB/MP
3.5/5 = MB/6
MB = ( 3.5 x 6 ) / 5 = 4.2 cm
Périmètre AMB = 3.5 + 4.2 + 4.9 = 12.6 cm
aire AMB = ( 4.9 * 2.8 ) / 2 = 6.86 cm²
part hachurée = 3/5 + 2/15 = 9/15 + 2/15 = 11 /15
A = 6 /8 = 3 /4
B = 5/8 - 2 /8 = 3/8
C = 7/12 + 3/12 = 10 /12 = 5 /6
D = 11 /7
E = 12/21 + 35/21 = 47 /21
F = 8/30 + 9/30 = 17/30
Explications étape par étape :
