Answer:
x = 163°
Step-by-step explanation:
The sum of interior angles of a pentagon is 540°. The missing value will bring the total to that. It can be found by subtracting the known values from 540°.
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x = 540° -85° -103° -121° -68°
x = 163°
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Additional comment
The sum of interior angles of a simple n-gon is found from the formula ...
angle sum = 180°·(n -2)
For n = 5, this is 180°×3 = 540°.
