Question

please answer the following
really appreciate it if you would
confused

Answer 1

Answer:

straight line=180°

60°+40°+5x-20°=180°

80°+5x = 180°

5x = 180°-80°

x = 100/5

x = 20°

so, 5x-20

5×20-20

100 - 20

80°