In the given figure, BC || AD. Find the measure of angle x, angle y and angle z.
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y+ 120° = 180° ( linear pair )
so, y = 60 °
y+z = 180° ( sum of opp. angles of a quadrilateral is 180°)
60°+z=180°
z = 120°
y+x = 180°
60°+ x=180°
x=120°
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