Răspuns :
MD/MA =DC/AB
MD/MD+DA =6/18
MD/MD+8 =6/18
18MD =(6MD+8)
18MD=6MD+48
18MD-6ND=48
12MD =48
MD =4 cm
MA =MD+DA =4+8 =12 cm
MD/MA =MC/MB
4/12 =MC/MC+10
12MC =4(MC+10)
12MC =4MC+40
12MC -4MC =40
8MC =40
MC =5 cm
MB =MC+BC =5+10=15 cm
MD/MD+DA =6/18
MD/MD+8 =6/18
18MD =(6MD+8)
18MD=6MD+48
18MD-6ND=48
12MD =48
MD =4 cm
MA =MD+DA =4+8 =12 cm
MD/MA =MC/MB
4/12 =MC/MC+10
12MC =4(MC+10)
12MC =4MC+40
12MC -4MC =40
8MC =40
MC =5 cm
MB =MC+BC =5+10=15 cm