Question

Punctele A, B si C sunt coliniare in aceasta ordine . Aflati lungimea segmentului:
AB, daca AC= 20 cm , BC=0,12 dm;
AC, daca AB= 9cm , BC=1,5dm
BC , daca AB= 1,4cm, AC= 4,1 dm

Answer 1

a) AB=AC-BC 
AB=20-1,2=18,8 (cm) 

b)AC=AB+BC 
AC=9+15=24 (cm) 

c)BC=AC-AB 
BC=41-1,4=39,6 (cm)