1)35°48'45''+17°5'15''
6°27'35''+40°32'50''
26°34'18''+18°25'42''
15°15'17''+18°44'43''
65°24''-16°34'50''

2) daca m(∡AOC)=30° si m (∡BOC)=40° care este m(∡AOB)
repede