cn da raspuns primeste fllw pe insta

Răspuns:
1.
90-65=25
180-65=115
x/2 + y/2 = 90/2 = 45
x/2 + y/2 = 180/2 = 90
2.
AOD=BOC (opuse la vf.)=140
=>AOB=DOC=(360-2•140)/2=40
EOC=DOC/2=20