bonjour
selon le th de Thalès
ON/OB = OM/OK = NK/MB
OB = 8.75 - 5 = 3.75
3 / 3.75 = 3 /OK
OK = ( 3.75 * 3 ) / 3 = 3.75
donc MK = 3 + 3.75 = 6.75
5 / 8.75 = 8 / MB
MB = ( 8 .75 * 8 ) / 5 = 14 cm
