] Find the value of unknown angle in each of the following figures.
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Answer:
55°
Step-by-step explanation:
The sum of all interior angles of a quadrilateral is 360°.
In the given quadrilateral, x is the unknown angle. The other three given angles of the quadrilateral are 125°,105°, and 75°.
x + 125°+ 105°+ 75° = 360°
x + 305° = 360°
x = 360° - 305°
x = 55°.
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