Ответ: а) Lab = Lbc = 6) Lab = Lbc = B) Lab = Lbc =

Ответ:

• а) ∠ab = 30°; ∠bc = 150°;
• б) ∠ab = 102°; ∠bc = 78°;
• в) ∠ab = 40°; ∠bc = 140°.