Answer:
Step-by-step explanation:
So a straight line adds up to 180 meaning:
180-100 = 80
A triangle also adds up to 180 meaning:
80+40+x = 180
120+x = 180
x = 60
i think the answer is 60
becuase 80 +40 equals 120 and minus 180 to 120 equals 60 degrees
leading the x value 60
