Answer:
30
Step-by-step explanation:
180 = 90 + x + 20 + x + 10
90 = 2x + 30
x = 30
x+20+x+10+90=180
2x+120=180
2x=60
x=30
hope it helps
I think it may be C? I used desmos to graph it but I'm not 100%
The last one
measure angle 2 and 6 to see if congruent
