Ինքնուրյուն աշխատանք

36. 180-43=137°

37. 180-30=150°

150:2=75°

75+30=105°

38. 180-40=140°

140:2=70°

70+40=110°

39. 3+1=4°

180:4=45°

45×3=135°

40. 5+1=6°

180:6=30°

30×5=160°

41. 18×2=36

180-36=144

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