Mathematics
BEC is an equilateral triangle inside the square ABCD. The value of angle ECD is :
60°
30°
75°
45°
Rectilinear Figures
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Answer
Given,
BEC is an equilateral triangle.
∴ ∠BCE = 60°.
From figure,
⇒ ∠ECD = ∠BCD - ∠BCE = 90° - 60° = 30°.
Hence, Option 2 is the correct option.
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