Question

exercitiul 28! va rog sa ma ajutati! dau coroana cui raspunde!

Answer 1

[tex]AD\cap{BC}=\{I\}\;inseamna\; ca\; \ \textless \ (BAI)=30^0\\deci\;arc(BD=2*30^0=60^0\,;\\ arc(ACB)=360-(120+80+60)=100^0;\\ m(\ \textless \ ACB)=100^0/2=50^0;[/tex]