10. Find the value of the unknown angles :
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Answer:
x=50
y=60
z=130
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Angle x = 50° ( vertically opposite angles)
Angle y = 180 - 70 + 50 (angle sum property)
= 180 - 120
= 60°
Angles z = 180 - 50 ( angles of linear pair)
= 130°
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