find the lettered angles in the figure
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- x= 70° (vertically opposite angles)
- z+110°= 180° (linear pair)
= z= 180°-110°
z= 70°
- x+z+y= 180°
= 70°+70°+y= 180° (angle sum property)
140°+y= 180°
y= 180°-140°
y= 40°
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