Answer:
x = 40
Explanation:
The shape adds up to 360 degrees, therefore we just have to find the one missing angle.
We are given 100, 100, and 120.
100+100+120 = 320
now it is just, 320 + x = 360
subtract 320 from both sides and you will get x = 40.
Answer: x=40 degrees
100+120+100=360-x
320=360-x
x=40 degrees
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