The angles of a quadrilateral are 80°, 100°, x°, (x + 10)°. Find the value of x.
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Answer:
x = 85
Step-by-step explanation:
The sum of Angles of an Quadrilateral = 360
80 + 100 + x + (x+10) = 360
190 + 2x = 360
2x = 360 - 190 = 170
2x = 170
x = 170/2 = 85
x = 85
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