1.In trapezul abcd , ab||cd,ab<cd,se considera m€(ad)si p€(bc) astfel incat am/md=3/4 si mp||ab .Stiind ca bc=21 cm calculati bp si pc.
2.In trapezul ABCD ,ab<cd ,ac intersectat cu bd =o ,ac=16 cm ,iar bo/od=3/5 .Calculati lungimile segmentelor ao ,si oc