Răspuns :
A B C
l------------l---------------------------l
[______________]
15 u.m.
[_____________________]
20 u.m. ( unitate de masura)
AB = AC - BC = 20 - 15 = 5 u.m.
l------------l---------------------------l
[______________]
15 u.m.
[_____________________]
20 u.m. ( unitate de masura)
AB = AC - BC = 20 - 15 = 5 u.m.