Answer:
x=20
Step-by-step explanation:
We know a straight line is 180 degrees so the upper corner is 60 degrees
The other corner is 55 because we see that the mirror side is the exact same
Total angle in a triangle is 180 so 60+55=45
2x+5 = 45
subtract 5 from each side to get
2x=20
x=10
