Question

in trapezul ABCD AC intersectat BD={O} BD=35 cm iar CO supra OA=3 supra 4 calculator lungimea segmentelor [OD] si [OB]

Answer 1

ABCD -trapez ⇒ AB||CD⇒ ΔAOB ~ ΔCOD⇒ AO/OC=BO/OD=4/3
BO/OD=4/3=k
BO=4k si OD=3k
OB+OD=35
4k+3k=35
7k=35
k=35:7
k=5
OB=4 x 5=20cm
OD=3 x 5=15 cm