Question
The figure shows 4 triangles. If the sum of ∠y and ∠a is 137° , find the sum of ∠d + ∠b + ∠v + ∠x.
2 m

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The figure shows 4 triangles. If the sum of ∠y and ∠a is 137° , find the sum of ∠d + ∠b + ∠v + ∠x.