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abcd is a parallelogram
1). cbe + cba = 180° ---- linear pair
60+ cba =180
----- cba = 120° ( opp angles of a parallelogram are equal) Y = 120°
2). dab + cba = 180° ( sum of adjacent angles of parallelogram is 180° )
dac + cab + cba = 180°
50° + x + 120° = 180°
x + 170° = 180°
X = 10°
3). adc + dca + cad = 180° ( all angles of a triangle measure 180°)
---- 50° + z + 120° = 180°
170° + z = 180°
Z = 10°
HENCE WE GET X = 10°, Y = 120°, Z = 10 ° .
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