Answer:
37
Step-by-step explanation:
all triangle's angle measures add up to 180
180-98-45 = x
x = 37
All triangles = 180 degrees
^ That is known.
98 + 45 = 143
^ These 2 angles are given (98 and 45)
180 - 143 = 37
^ This was the total.
37 is the final answer.
I hope I helped you!
