Question

Unghiul format de bisectoarele a doua unghiuri adiacente suplementare are masura egalu cu ? grade

Answer 1

[OX -bisect <AOB  <=> mas<AOX=mas<XOB= mas< AOB/2= 90/2=45 grade

[OY-bisect <BOC <=> mas< BOY=mas<YOC=mas<BOC/2= 90/2=45 grade

mas<XOY= mas<XOB+mas<BOY=45+45=90 grade