Q. 14.8( 6 Votes )

# In Fig. 16.176, Δ *ABC* is an equilateral triangle. Find *m*∠*BEC.*

Answer :

Since,

Triangle ABC is an equilateral triangle

∠BAC = 60^{o}

∠BAC + ∠BEC = 180^{o} (Opposite angles of quadrilateral)

60^{o} + ∠BEC = 180^{o}

∠BEC = 120^{o}

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