Răspuns :
Pai paranteza patrata inseamna dreapta inchisa iar paranteza rotunda dreapta deschisa !!
(AB)-segment deschis
(AB-segment partial deschis
[AB]-segment inchis
[AB-segment partial inchis
{AB}-segment deschis/inchis
{AB-segment partial deschis/inchis
(dB-segmentul dreapta b deschis
(AB-segment partial deschis
[AB]-segment inchis
[AB-segment partial inchis
{AB}-segment deschis/inchis
{AB-segment partial deschis/inchis
(dB-segmentul dreapta b deschis