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∠BCD = 50° [ ∵opp. angles of a llgm ]
z + ∠BCD = 180°
z = 180° - 50°
z = 130°
z = y [ ∵ alternate angle ]
y = x [ ∵ opp. angles of a llgm ]
∴ x = 130°
y = 130°
z = 130°
F o l l o w me
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