
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
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