The sum of the angle measures of a quadrilateral is 360 degree. Write and solve an equation to find the value of x.
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Answer: 115+85+60+x=360
x=100 degrees
Step-by-step explanation:
115+85+60+x=360==> 115, 85, 60, and x are all 4 angles in the quadrilateral
200+60+x=360
260+x=360
260-260+x=360-260
x=360-260
x=100 degrees